diff --git a/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Save.php b/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Save.php
index cfcd9560f72b8..91a98424c9ae1 100644
--- a/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Save.php
+++ b/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Save.php
@@ -222,14 +222,14 @@ public function execute()
                 $data['backend_model'] = $this->productHelper->getAttributeBackendModelByInputType(
                     $data['frontend_input']
                 );
+
+                if ($model->getIsUserDefined() === null) {
+                    $data['backend_type'] = $model->getBackendTypeByInput($data['frontend_input']);
+                }
             }
 
             $data += ['is_filterable' => 0, 'is_filterable_in_search' => 0];
 
-            if ($model->getIsUserDefined() === null || $model->getIsUserDefined() != 0) {
-                $data['backend_type'] = $model->getBackendTypeByInput($data['frontend_input']);
-            }
-
             $defaultValueField = $model->getDefaultValueByInput($data['frontend_input']);
             if ($defaultValueField) {
                 $data['default_value'] = $this->getRequest()->getParam($defaultValueField);
diff --git a/app/code/Magento/Catalog/Model/Indexer/Product/Flat/FlatTableBuilder.php b/app/code/Magento/Catalog/Model/Indexer/Product/Flat/FlatTableBuilder.php
index fbe0d4b550fa6..abe1b3eedbc84 100644
--- a/app/code/Magento/Catalog/Model/Indexer/Product/Flat/FlatTableBuilder.php
+++ b/app/code/Magento/Catalog/Model/Indexer/Product/Flat/FlatTableBuilder.php
@@ -341,6 +341,12 @@ protected function _updateTemporaryTableByStoreValues(
                     if (!empty($changedIds)) {
                         $select->where($this->_connection->quoteInto('et.entity_id IN (?)', $changedIds));
                     }
+
+                    /*
+                     * According to \Magento\Framework\DB\SelectRendererInterface select rendering may be updated
+                     * so we need to trigger select renderer for correct update
+                     */
+                    $select->assemble();
                     $sql = $select->crossUpdateFromSelect(['et' => $temporaryFlatTableName]);
                     $this->_connection->query($sql);
                 }
@@ -355,6 +361,7 @@ protected function _updateTemporaryTableByStoreValues(
                     if (!empty($changedIds)) {
                         $select->where($this->_connection->quoteInto('et.entity_id IN (?)', $changedIds));
                     }
+                    $select->assemble();
                     $sql = $select->crossUpdateFromSelect(['et' => $temporaryFlatTableName]);
                     $this->_connection->query($sql);
                 }
diff --git a/app/code/Magento/Catalog/Model/ResourceModel/Category.php b/app/code/Magento/Catalog/Model/ResourceModel/Category.php
index 1ecbc6566da0f..56b8a19d14255 100644
--- a/app/code/Magento/Catalog/Model/ResourceModel/Category.php
+++ b/app/code/Magento/Catalog/Model/ResourceModel/Category.php
@@ -920,7 +920,7 @@ public function changeParent(
         $childrenCount = $this->getChildrenCount($category->getId()) + 1;
         $table = $this->getEntityTable();
         $connection = $this->getConnection();
-        $levelFiled = $connection->quoteIdentifier('level');
+        $levelField = $connection->quoteIdentifier('level');
         $pathField = $connection->quoteIdentifier('path');
 
         /**
@@ -960,7 +960,7 @@ public function changeParent(
                         $newPath . '/'
                     ) . ')'
                 ),
-                'level' => new \Zend_Db_Expr($levelFiled . ' + ' . $levelDisposition)
+                'level' => new \Zend_Db_Expr($levelField . ' + ' . $levelDisposition)
             ],
             [$pathField . ' LIKE ?' => $category->getPath() . '/%']
         );
diff --git a/app/code/Magento/CatalogImportExport/Model/Export/Product.php b/app/code/Magento/CatalogImportExport/Model/Export/Product.php
index 86196cbe652a2..bf46c0efb2a74 100644
--- a/app/code/Magento/CatalogImportExport/Model/Export/Product.php
+++ b/app/code/Magento/CatalogImportExport/Model/Export/Product.php
@@ -352,7 +352,7 @@ class Product extends \Magento\ImportExport\Model\Export\Entity\AbstractEntity
      * @param \Magento\Framework\App\ResourceConnection $resource
      * @param \Magento\Store\Model\StoreManagerInterface $storeManager
      * @param \Psr\Log\LoggerInterface $logger
-     * @param \Magento\Catalog\Model\ResourceModel\Product\Collection $collection
+     * @param \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $collectionFactory
      * @param \Magento\ImportExport\Model\Export\ConfigInterface $exportConfig
      * @param \Magento\Catalog\Model\ResourceModel\ProductFactory $productFactory
      * @param \Magento\Eav\Model\ResourceModel\Entity\Attribute\Set\CollectionFactory $attrSetColFactory
@@ -361,9 +361,10 @@ class Product extends \Magento\ImportExport\Model\Export\Entity\AbstractEntity
      * @param \Magento\Catalog\Model\ResourceModel\Product\Option\CollectionFactory $optionColFactory
      * @param \Magento\Catalog\Model\ResourceModel\Product\Attribute\CollectionFactory $attributeColFactory
      * @param Product\Type\Factory $_typeFactory
-     * @param \Magento\Catalog\Model\Product\LinkTypeProvider $linkTypeProvider
-     * @param \Magento\CatalogImportExport\Model\Export\RowCustomizerInterface $rowCustomizer
+     * @param ProductEntity\LinkTypeProvider $linkTypeProvider
+     * @param RowCustomizerInterface $rowCustomizer
      * @param array $dateAttrCodes
+     * @throws \Magento\Framework\Exception\LocalizedException
      * @SuppressWarnings(PHPMD.ExcessiveParameterList)
      */
     public function __construct(
@@ -517,10 +518,13 @@ protected function getMediaGallery(array $productIds)
         if (empty($productIds)) {
             return [];
         }
+        
+        $productEntityJoinField = $this->getProductEntityLinkField();
+
         $select = $this->_connection->select()->from(
             ['mgvte' => $this->_resourceModel->getTableName('catalog_product_entity_media_gallery_value_to_entity')],
             [
-                "mgvte.{$this->getProductEntityLinkField()}",
+                "mgvte.$productEntityJoinField",
                 'mgvte.value_id'
             ]
         )->joinLeft(
@@ -532,7 +536,7 @@ protected function getMediaGallery(array $productIds)
             ]
         )->joinLeft(
             ['mgv' => $this->_resourceModel->getTableName('catalog_product_entity_media_gallery_value')],
-            '(mg.value_id = mgv.value_id)',
+            "(mg.value_id = mgv.value_id) and (mgvte.$productEntityJoinField = mgv.$productEntityJoinField)",
             [
                 'mgv.label',
                 'mgv.position',
@@ -540,14 +544,14 @@ protected function getMediaGallery(array $productIds)
                 'mgv.store_id'
             ]
         )->where(
-            "mgvte.{$this->getProductEntityLinkField()} IN (?)",
+            "mgvte.$productEntityJoinField IN (?)",
             $productIds
         );
 
         $rowMediaGallery = [];
         $stmt = $this->_connection->query($select);
         while ($mediaRow = $stmt->fetch()) {
-            $rowMediaGallery[$mediaRow[$this->getProductEntityLinkField()]][] = [
+            $rowMediaGallery[$mediaRow[$productEntityJoinField]][] = [
                 '_media_attribute_id' => $mediaRow['attribute_id'],
                 '_media_image' => $mediaRow['filename'],
                 '_media_label' => $mediaRow['label'],
@@ -689,6 +693,8 @@ protected function updateDataWithCategoryColumns(&$dataRow, &$rowCategories, $pr
     }
 
     /**
+     * Get header columns
+     *
      * {@inheritdoc}
      */
     public function _getHeaderColumns()
@@ -748,6 +754,8 @@ protected function _getExportMainAttrCodes()
     }
 
     /**
+     * Get entity collection
+     *
      * {@inheritdoc}
      */
     protected function _getEntityCollection($resetCollection = false)
@@ -818,9 +826,8 @@ protected function paginateCollection($page, $pageSize)
     }
 
     /**
-     * Export process
-     *
      * @return string
+     * @throws \Magento\Framework\Exception\LocalizedException
      */
     public function export()
     {
@@ -854,7 +861,11 @@ public function export()
     }
 
     /**
-     * {@inheritdoc}
+     * Apply filter to collection and add not skipped attributes to select.
+     *
+     * @param \Magento\Eav\Model\Entity\Collection\AbstractCollection $collection
+     * @return \Magento\Eav\Model\Entity\Collection\AbstractCollection
+     *
      * @since 100.2.0
      */
     protected function _prepareEntityCollection(\Magento\Eav\Model\Entity\Collection\AbstractCollection $collection)
@@ -916,11 +927,10 @@ protected function getExportData()
     }
 
     /**
-     * Load products' data from the collection
-     * and filter it (if needed).
+     * Load products' data from the collection and filter it (if needed).
      *
-     * @return array Keys are product IDs, values arrays with keys as store IDs
-     *               and values as store-specific versions of Product entity.
+     * @return array Keys are product IDs, values arrays with keys as store ID
+     * and values as store-specific versions of Product entity.
      */
     protected function loadCollection(): array
     {
diff --git a/app/code/Magento/CatalogInventory/view/adminhtml/ui_component/product_form.xml b/app/code/Magento/CatalogInventory/view/adminhtml/ui_component/product_form.xml
index 14ce874baecc4..409038a3f541a 100644
--- a/app/code/Magento/CatalogInventory/view/adminhtml/ui_component/product_form.xml
+++ b/app/code/Magento/CatalogInventory/view/adminhtml/ui_component/product_form.xml
@@ -285,7 +285,7 @@
                     <settings>
                         <scopeLabel>[GLOBAL]</scopeLabel>
                         <validation>
-                            <rule name="validate-number" xsi:type="boolean">true</rule>
+                            <rule name="validate-greater-than-zero" xsi:type="boolean">true</rule>
                         </validation>
                         <label translate="true">Maximum Qty Allowed in Shopping Cart</label>
                         <dataScope>max_sale_qty</dataScope>
diff --git a/app/code/Magento/Checkout/view/frontend/web/js/view/progress-bar.js b/app/code/Magento/Checkout/view/frontend/web/js/view/progress-bar.js
index e4b1e464348b9..db49683129f2b 100644
--- a/app/code/Magento/Checkout/view/frontend/web/js/view/progress-bar.js
+++ b/app/code/Magento/Checkout/view/frontend/web/js/view/progress-bar.js
@@ -24,11 +24,17 @@ define([
 
         /** @inheritdoc */
         initialize: function () {
+            var stepsValue;
+
             this._super();
             $(window).hashchange(_.bind(stepNavigator.handleHash, stepNavigator));
 
             if (!window.location.hash) {
-                stepNavigator.setHash(stepNavigator.steps().sort(stepNavigator.sortItems)[0].code);
+                stepsValue = stepNavigator.steps();
+
+                if (stepsValue.length) {
+                    stepNavigator.setHash(stepsValue.sort(stepNavigator.sortItems)[0].code);
+                }
             }
 
             stepNavigator.handleHash();
diff --git a/app/code/Magento/Customer/Model/Address.php b/app/code/Magento/Customer/Model/Address.php
index 1dcd8516af69f..c39420542248e 100644
--- a/app/code/Magento/Customer/Model/Address.php
+++ b/app/code/Magento/Customer/Model/Address.php
@@ -154,9 +154,6 @@ public function updateData(AddressInterface $address)
         // Need to explicitly set this due to discrepancy in the keys between model and data object
         $this->setIsDefaultBilling($address->isDefaultBilling());
         $this->setIsDefaultShipping($address->isDefaultShipping());
-        if (!$this->getAttributeSetId()) {
-            $this->setAttributeSetId(AddressMetadataInterface::ATTRIBUTE_SET_ID_ADDRESS);
-        }
         $customAttributes = $address->getCustomAttributes();
         if ($customAttributes !== null) {
             foreach ($customAttributes as $attribute) {
diff --git a/app/code/Magento/Customer/Model/Customer.php b/app/code/Magento/Customer/Model/Customer.php
index e0a7281776de9..e359b904347ef 100644
--- a/app/code/Magento/Customer/Model/Customer.php
+++ b/app/code/Magento/Customer/Model/Customer.php
@@ -358,13 +358,6 @@ public function updateData($customer)
             $this->setId($customerId);
         }
 
-        // Need to use attribute set or future updates can cause data loss
-        if (!$this->getAttributeSetId()) {
-            $this->setAttributeSetId(
-                CustomerMetadataInterface::ATTRIBUTE_SET_ID_CUSTOMER
-            );
-        }
-
         return $this;
     }
 
@@ -960,6 +953,16 @@ public function getSharedWebsiteIds()
         return $ids;
     }
 
+    /**
+     * Retrieve attribute set id for customer.
+     *
+     * @return int
+     */
+    public function getAttributeSetId()
+    {
+        return parent::getAttributeSetId() ?: CustomerMetadataInterface::ATTRIBUTE_SET_ID_CUSTOMER;
+    }
+
     /**
      * Set store to customer
      *
diff --git a/app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php b/app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php
index 12d9dc9bcaa22..29f97d9f643a7 100644
--- a/app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php
+++ b/app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php
@@ -205,12 +205,6 @@ public function save(\Magento\Customer\Api\Data\CustomerInterface $customer, $pa
             $customerModel->setStoreId($this->storeManager->getStore()->getId());
         }
 
-        // Need to use attribute set or future updates can cause data loss
-        if (!$customerModel->getAttributeSetId()) {
-            $customerModel->setAttributeSetId(
-                \Magento\Customer\Api\CustomerMetadataInterface::ATTRIBUTE_SET_ID_CUSTOMER
-            );
-        }
         $this->populateCustomerWithSecureData($customerModel, $passwordHash);
 
         // If customer email was changed, reset RpToken info
diff --git a/app/code/Magento/Customer/Test/Unit/Model/CustomerTest.php b/app/code/Magento/Customer/Test/Unit/Model/CustomerTest.php
index f5b7f08d2906d..b9e73a6613bab 100644
--- a/app/code/Magento/Customer/Test/Unit/Model/CustomerTest.php
+++ b/app/code/Magento/Customer/Test/Unit/Model/CustomerTest.php
@@ -307,8 +307,6 @@ public function testUpdateData()
         }
 
         $expectedResult[$attribute->getAttributeCode()] = $attribute->getValue();
-        $expectedResult['attribute_set_id'] =
-            \Magento\Customer\Api\CustomerMetadataInterface::ATTRIBUTE_SET_ID_CUSTOMER;
 
         $this->assertEquals($this->_model->getData(), $expectedResult);
     }
diff --git a/app/code/Magento/Customer/Test/Unit/Model/ResourceModel/CustomerRepositoryTest.php b/app/code/Magento/Customer/Test/Unit/Model/ResourceModel/CustomerRepositoryTest.php
index 41816d26982d6..215cc32193b18 100644
--- a/app/code/Magento/Customer/Test/Unit/Model/ResourceModel/CustomerRepositoryTest.php
+++ b/app/code/Magento/Customer/Test/Unit/Model/ResourceModel/CustomerRepositoryTest.php
@@ -334,12 +334,6 @@ public function testSave()
         $customerModel->expects($this->once())
             ->method('setId')
             ->with($customerId);
-        $customerModel->expects($this->once())
-            ->method('getAttributeSetId')
-            ->willReturn(null);
-        $customerModel->expects($this->once())
-            ->method('setAttributeSetId')
-            ->with(\Magento\Customer\Api\CustomerMetadataInterface::ATTRIBUTE_SET_ID_CUSTOMER);
         $customerAttributesMetaData->expects($this->atLeastOnce())
             ->method('getId')
             ->willReturn($customerId);
@@ -616,12 +610,6 @@ public function testSaveWithPasswordHash()
         $customerModel->expects($this->once())
             ->method('setId')
             ->with($customerId);
-        $customerModel->expects($this->once())
-            ->method('getAttributeSetId')
-            ->willReturn(null);
-        $customerModel->expects($this->once())
-            ->method('setAttributeSetId')
-            ->with(\Magento\Customer\Api\CustomerMetadataInterface::ATTRIBUTE_SET_ID_CUSTOMER);
         $customerModel->expects($this->atLeastOnce())
             ->method('getId')
             ->willReturn($customerId);
diff --git a/app/code/Magento/Directory/Setup/UpgradeData.php b/app/code/Magento/Directory/Setup/UpgradeData.php
index d149a83ce8e9d..8ef73e2ef36b0 100644
--- a/app/code/Magento/Directory/Setup/UpgradeData.php
+++ b/app/code/Magento/Directory/Setup/UpgradeData.php
@@ -46,6 +46,9 @@ public function upgrade(ModuleDataSetupInterface $setup, ModuleContextInterface
         if (version_compare($context->getVersion(), '2.0.2', '<')) {
             $this->addCountryRegions($setup, 'IN', $this->getDataForIndia());
         }
+        if (version_compare($context->getVersion(), '2.0.3', '<')) {
+            $this->addCountryRegions($setup, 'AU', $this->getDataForAustralia());
+        }
     }
 
     /**
@@ -127,6 +130,25 @@ private function getDataForIndia()
         ];
     }
 
+    /**
+     * Australian states data.
+     *
+     * @return array
+     */
+    private function getDataForAustralia()
+    {
+        return [
+            'ACT' => 'Australian Capital Territory',
+            'NSW' => 'New South Wales',
+            'VIC' => 'Victoria',
+            'QLD' => 'Queensland',
+            'SA' => 'South Australia',
+            'TAS' => 'Tasmania',
+            'WA' => 'Western Australia',
+            'NT' => 'Northern Territory'
+        ];
+    }
+
     /**
      * Add country regions data to appropriate tables.
      *
diff --git a/app/code/Magento/Directory/etc/module.xml b/app/code/Magento/Directory/etc/module.xml
index a3735ca6ddde1..cc8023b9b3873 100644
--- a/app/code/Magento/Directory/etc/module.xml
+++ b/app/code/Magento/Directory/etc/module.xml
@@ -6,7 +6,7 @@
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
-    <module name="Magento_Directory" setup_version="2.0.2">
+    <module name="Magento_Directory" setup_version="2.0.3">
         <sequence>
             <module name="Magento_Store"/>
         </sequence>
diff --git a/app/code/Magento/Eav/Model/Entity/Attribute/Source/Table.php b/app/code/Magento/Eav/Model/Entity/Attribute/Source/Table.php
index 0f3b8be32b988..59164a1dd0922 100644
--- a/app/code/Magento/Eav/Model/Entity/Attribute/Source/Table.php
+++ b/app/code/Magento/Eav/Model/Entity/Attribute/Source/Table.php
@@ -10,6 +10,8 @@
 use Magento\Framework\Escaper;
 
 /**
+ * Eav attribute default source when values are coming from another table
+ *
  * @api
  * @since 100.0.2
  */
@@ -136,12 +138,14 @@ public function getSpecificOptions($ids, $withEmpty = true)
     }
 
     /**
+     * Add an empty option to the array
+     *
      * @param array $options
      * @return array
      */
     private function addEmptyOption(array $options)
     {
-        array_unshift($options, ['label' => $this->getAttribute()->getIsRequired() ? '' : ' ', 'value' => '']);
+        array_unshift($options, ['label' => ' ', 'value' => '']);
         return $options;
     }
 
diff --git a/app/code/Magento/Sales/Test/Unit/Observer/AssignOrderToCustomerObserverTest.php b/app/code/Magento/Sales/Test/Unit/Observer/AssignOrderToCustomerObserverTest.php
new file mode 100644
index 0000000000000..c6e02151b9bc1
--- /dev/null
+++ b/app/code/Magento/Sales/Test/Unit/Observer/AssignOrderToCustomerObserverTest.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Sales\Test\Unit\Observer;
+
+use Magento\Customer\Api\Data\CustomerInterface;
+use Magento\Framework\Event;
+use Magento\Framework\Event\Observer;
+use Magento\Sales\Api\Data\OrderInterface;
+use Magento\Sales\Api\OrderRepositoryInterface;
+use Magento\Sales\Observer\AssignOrderToCustomerObserver;
+use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject;
+
+/**
+ * Class AssignOrderToCustomerObserverTest
+ */
+class AssignOrderToCustomerObserverTest extends TestCase
+{
+    /** @var AssignOrderToCustomerObserver */
+    protected $sut;
+
+    /** @var OrderRepositoryInterface|PHPUnit_Framework_MockObject_MockObject */
+    protected $orderRepositoryMock;
+
+    /**
+     * Set Up
+     */
+    protected function setUp()
+    {
+        $this->orderRepositoryMock = $this->getMockBuilder(OrderRepositoryInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->sut = new AssignOrderToCustomerObserver($this->orderRepositoryMock);
+    }
+
+    /**
+     * Test assigning order to customer after issuing guest order
+     *
+     * @dataProvider getCustomerIds
+     * @param null|int $customerId
+     * @return void
+     */
+    public function testAssignOrderToCustomerAfterGuestOrder($customerId)
+    {
+        $orderId = 1;
+        /** @var Observer|PHPUnit_Framework_MockObject_MockObject $observerMock */
+        $observerMock = $this->createMock(Observer::class);
+        /** @var Event|PHPUnit_Framework_MockObject_MockObject $eventMock */
+        $eventMock = $this->getMockBuilder(Event::class)->disableOriginalConstructor()
+            ->setMethods(['getData'])
+            ->getMock();
+        /** @var CustomerInterface|PHPUnit_Framework_MockObject_MockObject $customerMock */
+        $customerMock = $this->createMock(CustomerInterface::class);
+        /** @var OrderInterface|PHPUnit_Framework_MockObject_MockObject $orderMock */
+        $orderMock = $this->getMockBuilder(OrderInterface::class)
+            ->disableOriginalConstructor()
+            ->getMockForAbstractClass();
+        $observerMock->expects($this->once())->method('getEvent')->willReturn($eventMock);
+        $eventMock->expects($this->any())->method('getData')
+            ->willReturnMap([
+                ['delegate_data', null, ['__sales_assign_order_id' => $orderId]],
+                ['customer_data_object', null, $customerMock]
+            ]);
+        $orderMock->expects($this->once())->method('getCustomerId')->willReturn($customerId);
+        $this->orderRepositoryMock->expects($this->once())->method('get')->with($orderId)
+            ->willReturn($orderMock);
+        if (!$customerId) {
+            $this->orderRepositoryMock->expects($this->once())->method('save')->with($orderMock);
+            $this->sut->execute($observerMock);
+            return ;
+        }
+
+        $this->orderRepositoryMock->expects($this->never())->method('save')->with($orderMock);
+        $this->sut->execute($observerMock);
+    }
+
+    /**
+     * Customer id assigned to order
+     *
+     * @return array
+     */
+    public function getCustomerIds()
+    {
+        return [[null, 1]];
+    }
+}
diff --git a/app/code/Magento/Widget/Model/Widget/Instance.php b/app/code/Magento/Widget/Model/Widget/Instance.php
index afe7ef3766f7c..1ccb75ad6611a 100644
--- a/app/code/Magento/Widget/Model/Widget/Instance.php
+++ b/app/code/Magento/Widget/Model/Widget/Instance.php
@@ -15,7 +15,7 @@
  * @method string getTitle()
  * @method \Magento\Widget\Model\Widget\Instance setTitle(string $value)
  * @method \Magento\Widget\Model\Widget\Instance setStoreIds(string $value)
- * @method \Magento\Widget\Model\Widget\Instance setWidgetParameters(string $value)
+ * @method \Magento\Widget\Model\Widget\Instance setWidgetParameters(string|array $value)
  * @method int getSortOrder()
  * @method \Magento\Widget\Model\Widget\Instance setSortOrder(int $value)
  * @method \Magento\Widget\Model\Widget\Instance setThemeId(int $value)
diff --git a/app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_footer.less b/app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_footer.less
index 2958708e51deb..0244775fad0b6 100644
--- a/app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_footer.less
+++ b/app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/_footer.less
@@ -25,7 +25,7 @@
     border-top: @footer__border-width solid @footer__border-color;
     color: @footer__color;
     margin-top: auto;
-    padding: 2.6rem 2rem 6rem 3rem;
+    padding: 2.6rem 3rem 6rem;
 
     a {
         .lib-link(
diff --git a/lib/internal/Magento/Framework/Communication/Config/Validator.php b/lib/internal/Magento/Framework/Communication/Config/Validator.php
index 5e2687c3b08c1..76ef1b85b63eb 100644
--- a/lib/internal/Magento/Framework/Communication/Config/Validator.php
+++ b/lib/internal/Magento/Framework/Communication/Config/Validator.php
@@ -38,6 +38,8 @@ public function __construct(
     }
 
     /**
+     * Validate response schema definition for topic
+     *
      * @param string $responseSchema
      * @param string $topicName
      * @return void
@@ -46,6 +48,12 @@ public function validateResponseSchemaType($responseSchema, $topicName)
     {
         try {
             $this->validateType($responseSchema);
+        } catch (\InvalidArgumentException $e) {
+            throw new \LogicException(
+                'Response schema definition has service class with wrong annotated methods',
+                $e->getCode(),
+                $e
+            );
         } catch (\Exception $e) {
             throw new \LogicException(
                 sprintf(
@@ -59,6 +67,8 @@ public function validateResponseSchemaType($responseSchema, $topicName)
     }
 
     /**
+     * Validate request schema definition for topic
+     *
      * @param string $requestSchema
      * @param string $topicName
      * @return void
@@ -67,6 +77,12 @@ public function validateRequestSchemaType($requestSchema, $topicName)
     {
         try {
             $this->validateType($requestSchema);
+        } catch (\InvalidArgumentException $e) {
+            throw new \LogicException(
+                'Request schema definition has service class with wrong annotated methods',
+                $e->getCode(),
+                $e
+            );
         } catch (\Exception $e) {
             throw new \LogicException(
                 sprintf(
@@ -80,6 +96,8 @@ public function validateRequestSchemaType($requestSchema, $topicName)
     }
 
     /**
+     * Validate service method specified in the definition of handler
+     *
      * @param string $serviceName
      * @param string $methodName
      * @param string $handlerName
@@ -109,6 +127,7 @@ public function validateResponseHandlersType($serviceName, $methodName, $handler
      * @param string $typeName
      * @return $this
      * @throws \Exception In case when type is invalid
+     * @throws \InvalidArgumentException if methods don't have annotation
      */
     protected function validateType($typeName)
     {
diff --git a/lib/internal/Magento/Framework/Reflection/MethodsMap.php b/lib/internal/Magento/Framework/Reflection/MethodsMap.php
index 944cd8771ee33..6b0ddfbfc2127 100644
--- a/lib/internal/Magento/Framework/Reflection/MethodsMap.php
+++ b/lib/internal/Magento/Framework/Reflection/MethodsMap.php
@@ -94,6 +94,8 @@ public function getMethodReturnType($typeName, $methodName)
      *  'validatePassword' => 'boolean'
      * ]
      * </pre>
+     * @throws \InvalidArgumentException if methods don't have annotation
+     * @throws \ReflectionException for missing DocBock or invalid reflection class
      */
     public function getMethodsMap($interfaceName)
     {
@@ -148,6 +150,8 @@ public function getMethodParams($serviceClassName, $serviceMethodName)
      *
      * @param string $interfaceName
      * @return array
+     * @throws \ReflectionException for missing DocBock or invalid reflection class
+     * @throws \InvalidArgumentException if methods don't have annotation
      */
     private function getMethodMapViaReflection($interfaceName)
     {
diff --git a/lib/internal/Magento/Framework/Test/Unit/Communication/Config/ValidatorTest.php b/lib/internal/Magento/Framework/Test/Unit/Communication/Config/ValidatorTest.php
new file mode 100644
index 0000000000000..55410af176af0
--- /dev/null
+++ b/lib/internal/Magento/Framework/Test/Unit/Communication/Config/ValidatorTest.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Framework\Test\Unit\Communication\Config;
+
+use Magento\Framework\Communication\Config\Validator;
+use Magento\Framework\Reflection\MethodsMap;
+use Magento\Framework\Reflection\TypeProcessor;
+
+/**
+ * Unit test for \Magento\Framework\Communication\Config\Validator class
+ */
+class ValidatorTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @var TypeProcessor|\PHPUnit_Framework_MockObject_MockObject
+     */
+    protected $typeProcessor;
+
+    /**
+     * @var MethodsMap|\PHPUnit_Framework_MockObject_MockObject
+     */
+    protected $methodsMap;
+
+    public function setUp()
+    {
+        $this->methodsMap = $this->createMock(MethodsMap::class);
+
+        $this->methodsMap->expects(static::any())
+            ->method('getMethodsMap')
+            ->will($this->throwException(new \InvalidArgumentException('message', 333)));
+
+        $this->typeProcessor = $this->createMock(TypeProcessor::class);
+        $this->typeProcessor->expects(static::any())
+            ->method('isTypeSimple')
+            ->willReturn(false);
+
+        $this->typeProcessor->expects(static::any())
+            ->method('isTypeSimple')
+            ->willReturn(false);
+    }
+
+    /**
+     * @expectedException  \LogicException
+     * @expectedExceptionCode 333
+     * @expectedExceptionMessage Response schema definition has service class with wrong annotated methods
+     */
+    public function testValidateResponseSchemaType()
+    {
+        /** @var Validator $validator */
+        $validator = new Validator($this->typeProcessor, $this->methodsMap);
+        $validator->validateResponseSchemaType('123', '123');
+    }
+
+    /**
+     * @expectedException  \LogicException
+     * @expectedExceptionCode 333
+     * @expectedExceptionMessage Request schema definition has service class with wrong annotated methods
+     */
+    public function testValidateRequestSchemaType()
+    {
+        /** @var Validator $validator */
+        $validator = new Validator($this->typeProcessor, $this->methodsMap);
+        $validator->validateRequestSchemaType('123', '123');
+    }
+}