diff --git a/packages/angular-material/test/autocomplete-control.spec.ts b/packages/angular-material/test/autocomplete-control.spec.ts
index 678f43af8f..777613ef43 100644
--- a/packages/angular-material/test/autocomplete-control.spec.ts
+++ b/packages/angular-material/test/autocomplete-control.spec.ts
@@ -293,7 +293,7 @@ describe('AutoComplete control Error Tests', () => {
   it('should display errors', () => {
     const errors: ErrorObject[] = [
       {
-        instancePath: '.foo',
+        instancePath: '/foo',
         message: 'Hi, this is me, test error!',
         params: {},
         keyword: '',
diff --git a/packages/angular-material/test/date-control.spec.ts b/packages/angular-material/test/date-control.spec.ts
index 3787cd520e..27a4330183 100644
--- a/packages/angular-material/test/date-control.spec.ts
+++ b/packages/angular-material/test/date-control.spec.ts
@@ -257,7 +257,7 @@ describe('Date control Error Tests', () => {
     const formsService = getJsonFormsService(component);
     formsService.updateCore(Actions.updateErrors([
       {
-        instancePath: '.foo',
+        instancePath: '/foo',
         message: 'Hi, this is me, test error!',
         params: {},
         keyword: '',
diff --git a/packages/angular-test/src/boolean.ts b/packages/angular-test/src/boolean.ts
index 0e761b0a08..f33489fdc5 100644
--- a/packages/angular-test/src/boolean.ts
+++ b/packages/angular-test/src/boolean.ts
@@ -281,7 +281,7 @@ export const booleanErrorTest = <C extends JsonFormsControl, I>(
     });
     formsService.updateCore(Actions.updateErrors([
       {
-        instancePath: '.foo',
+        instancePath: '/foo',
         message: 'Hi, this is me, test error!',
         keyword: '',
         schemaPath: '',
diff --git a/packages/angular-test/src/number.ts b/packages/angular-test/src/number.ts
index d0c7011359..c5d686677f 100644
--- a/packages/angular-test/src/number.ts
+++ b/packages/angular-test/src/number.ts
@@ -346,7 +346,7 @@ export const numberErrorTest = <C extends JsonFormsControl>(
     });
     formsService.updateCore(Actions.updateErrors([
       {
-        instancePath: '.foo',
+        instancePath: '/foo',
         message: 'Hi, this is me, test error!',
         keyword: '',
         schemaPath: '',
diff --git a/packages/angular-test/src/range.ts b/packages/angular-test/src/range.ts
index ceb93a868f..74c5b82479 100644
--- a/packages/angular-test/src/range.ts
+++ b/packages/angular-test/src/range.ts
@@ -324,7 +324,7 @@ export const rangeErrorTest = <C extends JsonFormsControl, I>(
     });
     formsService.updateCore(Actions.updateErrors([
       {
-        instancePath: '.foo',
+        instancePath: '/foo',
         message: 'Hi, this is me, test error!',
         keyword: '',
         schemaPath: '',
diff --git a/packages/angular-test/src/text.ts b/packages/angular-test/src/text.ts
index 763d553bfe..2802ba40b3 100644
--- a/packages/angular-test/src/text.ts
+++ b/packages/angular-test/src/text.ts
@@ -293,7 +293,7 @@ export const textErrorTest = <C extends JsonFormsControl>(
     });
     formsService.updateCore(Actions.updateErrors([
       {
-        instancePath: '.foo',
+        instancePath: '/foo',
         message: 'Hi, this is me, test error!',
         keyword: '',
         schemaPath: '',
diff --git a/packages/core/src/reducers/core.ts b/packages/core/src/reducers/core.ts
index d706c38d06..b6c5ce546b 100644
--- a/packages/core/src/reducers/core.ts
+++ b/packages/core/src/reducers/core.ts
@@ -318,17 +318,17 @@ export const getControlPath = (error: ErrorObject) => {
   }
   // dataPath was renamed to instancePath in AJV v8
   var controlPath: string = error.instancePath;
-    const invalidProperty = getInvalidProperty(error);
-    if (invalidProperty !== undefined && !controlPath.endsWith(invalidProperty)) {
-      controlPath = `${controlPath}.${invalidProperty}`;
-    }
-    // remove '.' chars at the beginning of paths
-    controlPath = controlPath.replace(/^./, '');
-    // change array paths to dot notation (e.g. 'segment[0]' becomes 'segment.0')
-    controlPath = controlPath.replace(
-      /\[\d+\]/g,
-      m => '.' + m.match(/\d+/g)[0]
-      );
+
+  // change '/' chars to '.'
+  controlPath = controlPath.replace(/\//g, '.');
+  
+  const invalidProperty = getInvalidProperty(error);
+  if (invalidProperty !== undefined && !controlPath.endsWith(invalidProperty)) {
+    controlPath = `${controlPath}.${invalidProperty}`;
+  }
+  
+  // remove '.' chars at the beginning of paths
+  controlPath = controlPath.replace(/^./, '');
   return controlPath;
 }
 
diff --git a/packages/core/src/util/validator.ts b/packages/core/src/util/validator.ts
index 4610833f7e..6321fa8b8c 100644
--- a/packages/core/src/util/validator.ts
+++ b/packages/core/src/util/validator.ts
@@ -29,7 +29,6 @@ import { Options } from 'ajv';
 export const createAjv = (options?: Options) => {
   const ajv = new Ajv({
     allErrors: true,
-    jsPropertySyntax: true,
     verbose: true,
     ...options
   });
diff --git a/packages/core/test/reducers/core.test.ts b/packages/core/test/reducers/core.test.ts
index 25081724f6..ab5e8a5e31 100644
--- a/packages/core/test/reducers/core.test.ts
+++ b/packages/core/test/reducers/core.test.ts
@@ -502,7 +502,7 @@ test('core reducer - updateErrors - should update errors with error', t => {
   };
 
   const error = {
-    instancePath: 'color',
+    instancePath: '/color',
     keyword: 'enum',
     message: 'should be equal to one of the allowed values',
     params: {
diff --git a/packages/core/test/util/renderer.test.ts b/packages/core/test/util/renderer.test.ts
index 87a3667759..bfbcb2c3a2 100644
--- a/packages/core/test/util/renderer.test.ts
+++ b/packages/core/test/util/renderer.test.ts
@@ -384,7 +384,7 @@ test('mapStateToControlProps - errors', t => {
   };
   const clonedState = _.cloneDeep(createState(coreUISchema));
   const error: ErrorObject = {
-    instancePath: '.firstName',
+    instancePath: '/firstName',
     message: 'Duff beer',
     keyword: 'whatever',
     schemaPath: '',