diff --git a/src/libs/ReportActionsUtils.js b/src/libs/ReportActionsUtils.js
index 7c60e65eda3c..df55ae49faee 100644
--- a/src/libs/ReportActionsUtils.js
+++ b/src/libs/ReportActionsUtils.js
@@ -41,19 +41,8 @@ function isDeletedAction(reportAction) {
 }
 
 /**
- * @param {Object} reportAction
- * @returns {Boolean}
- */
-function isOptimisticAction(reportAction) {
-    return lodashGet(reportAction, 'pendingAction') === CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD;
-}
-
-/**
- * Sort an array of reportActions by:
- *
- * - Finalized actions always are "later" than optimistic actions
- * - then sort by created timestamp
- * - then sort by reportActionID. This gives us a stable order even in the case of multiple reportActions created on the same millisecond
+ * Sort an array of reportActions by their created timestamp first, and reportActionID second
+ * This gives us a stable order even in the case of multiple reportActions created on the same millisecond
  *
  * @param {Array} reportActions
  * @param {Boolean} shouldSortInDescendingOrder
@@ -68,11 +57,6 @@ function getSortedReportActions(reportActions, shouldSortInDescendingOrder = fal
     return _.chain(reportActions)
         .compact()
         .sort((first, second) => {
-            // First, make sure that optimistic reportActions appear at the end
-            if (isOptimisticAction(second) && !isOptimisticAction(first)) {
-                return -1 * invertedMultiplier;
-            }
-
             // First sort by timestamp
             if (first.created !== second.created) {
                 return (first.created < second.created ? -1 : 1) * invertedMultiplier;
diff --git a/src/libs/ReportUtils.js b/src/libs/ReportUtils.js
index e0904aff8ab7..bb07c7d25e34 100644
--- a/src/libs/ReportUtils.js
+++ b/src/libs/ReportUtils.js
@@ -21,7 +21,6 @@ import linkingConfig from './Navigation/linkingConfig';
 import * as defaultAvatars from '../components/Icon/DefaultAvatars';
 import isReportMessageAttachment from './isReportMessageAttachment';
 import * as defaultWorkspaceAvatars from '../components/Icon/WorkspaceDefaultAvatars';
-import * as CollectionUtils from './CollectionUtils';
 
 let sessionEmail;
 Onyx.connect({
@@ -72,21 +71,6 @@ Onyx.connect({
     callback: val => allReports = val,
 });
 
-const lastReportActions = {};
-Onyx.connect({
-    key: ONYXKEYS.COLLECTION.REPORT_ACTIONS,
-    callback: (actions, key) => {
-        if (!key || !actions) {
-            return;
-        }
-        const reportID = CollectionUtils.extractCollectionItemID(key);
-        lastReportActions[reportID] = _.find(
-            ReportActionsUtils.getSortedReportActionsForDisplay(_.toArray(actions)),
-            reportAction => reportAction.pendingAction !== CONST.RED_BRICK_ROAD_PENDING_ACTION.DELETE,
-        );
-    },
-});
-
 let doesDomainHaveApprovedAccountant;
 Onyx.connect({
     key: ONYXKEYS.ACCOUNT,
@@ -450,31 +434,6 @@ function canShowReportRecipientLocalTime(personalDetails, report) {
         && isReportParticipantValidated);
 }
 
-/**
- * Gets the last message text from the report.
- * Looks at reportActions data as the "best source" for information, because the front-end may have optimistic reportActions that the server is not yet aware of.
- * If reportActions are not loaded for the report, then there can't be any optimistic reportActions, and the lastMessageText rNVP will be accurate as a fallback.
- *
- * @param {Object} report
- * @returns {String}
- */
-function getLastMessageText(report) {
-    if (!report) {
-        return '';
-    }
-
-    const lastReportAction = lastReportActions[report.reportID];
-    let lastReportActionText = report.lastMessageText;
-    let lastReportActionHtml = report.lastMessageHtml;
-    if (lastReportAction && lastReportAction.actionName === CONST.REPORT.ACTIONS.TYPE.ADDCOMMENT) {
-        lastReportActionText = lodashGet(lastReportAction, 'message[0].text', report.lastMessageText);
-        lastReportActionHtml = lodashGet(lastReportAction, 'message[0].html', report.lastMessageHtml);
-    }
-    return isReportMessageAttachment({text: lastReportActionText, html: lastReportActionHtml})
-        ? `[${Localize.translateLocal('common.attachment')}]`
-        : Str.htmlDecode(lastReportActionText);
-}
-
 /**
  * Trim the last message text to a fixed limit.
  * @param {String} lastMessageText
@@ -1715,7 +1674,6 @@ export {
     isIOUOwnedByCurrentUser,
     getIOUTotal,
     canShowReportRecipientLocalTime,
-    getLastMessageText,
     formatReportLastMessageText,
     chatIncludesConcierge,
     isPolicyExpenseChat,
diff --git a/src/libs/SidebarUtils.js b/src/libs/SidebarUtils.js
index eaa6d3929c5d..3e6fd500c98e 100644
--- a/src/libs/SidebarUtils.js
+++ b/src/libs/SidebarUtils.js
@@ -5,7 +5,6 @@ import lodashOrderBy from 'lodash/orderBy';
 import Str from 'expensify-common/lib/str';
 import ONYXKEYS from '../ONYXKEYS';
 import * as ReportUtils from './ReportUtils';
-import * as ReportActionsUtils from './ReportActionsUtils';
 import * as Localize from './Localize';
 import CONST from '../CONST';
 import * as OptionsListUtils from './OptionsListUtils';
@@ -62,7 +61,7 @@ Onyx.connect({
             return;
         }
         const reportID = CollectionUtils.extractCollectionItemID(key);
-        lastReportActions[reportID] = _.first(ReportActionsUtils.getSortedReportActionsForDisplay(_.toArray(actions)));
+        lastReportActions[reportID] = _.last(_.toArray(actions));
         reportActions[key] = actions;
     },
 });
@@ -244,7 +243,12 @@ function getOptionData(reportID) {
     // We only create tooltips for the first 10 users or so since some reports have hundreds of users, causing performance to degrade.
     const displayNamesWithTooltips = ReportUtils.getDisplayNamesWithTooltips((participantPersonalDetailList || []).slice(0, 10), hasMultipleParticipants);
 
-    const lastMessageTextFromReport = ReportUtils.getLastMessageText(report);
+    let lastMessageTextFromReport = '';
+    if (ReportUtils.isReportMessageAttachment({text: report.lastMessageText, html: report.lastMessageHtml})) {
+        lastMessageTextFromReport = `[${Localize.translateLocal('common.attachment')}]`;
+    } else {
+        lastMessageTextFromReport = Str.htmlDecode(report ? report.lastMessageText : '');
+    }
 
     // If the last actor's details are not currently saved in Onyx Collection,
     // then try to get that from the last report action.
@@ -259,7 +263,7 @@ function getOptionData(reportID) {
     let lastMessageText = hasMultipleParticipants && lastActorDetails && (lastActorDetails.login !== currentUserLogin.email)
         ? `${lastActorDetails.displayName}: `
         : '';
-    lastMessageText += lastMessageTextFromReport;
+    lastMessageText += report ? lastMessageTextFromReport : '';
 
     if (result.isPolicyExpenseChat && result.isArchivedRoom) {
         const archiveReason = (lastReportActions[report.reportID] && lastReportActions[report.reportID].originalMessage && lastReportActions[report.reportID].originalMessage.reason)
diff --git a/tests/unit/ReportActionsUtilsTest.js b/tests/unit/ReportActionsUtilsTest.js
index ad473647dc60..20bf389969b7 100644
--- a/tests/unit/ReportActionsUtilsTest.js
+++ b/tests/unit/ReportActionsUtilsTest.js
@@ -6,15 +6,7 @@ describe('ReportActionsUtils', () => {
         const cases = [
             [
                 [
-                    // This is the lowest created timestamp, but because it's an optimistic action it should appear last
-                    {
-                        created: '2022-11-09 20:00:00.000',
-                        reportActionID: '395268342',
-                        actionName: CONST.REPORT.ACTIONS.TYPE.ADDCOMMENT,
-                        pendingAction: CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD,
-                    },
-
-                    // This is the highest created timestamp, so should appear 2nd-to-last
+                    // This is the highest created timestamp, so should appear last
                     {
                         created: '2022-11-09 22:27:01.825',
                         reportActionID: '8401445780099176',
@@ -69,12 +61,6 @@ describe('ReportActionsUtils', () => {
                         reportActionID: '8401445780099176',
                         actionName: CONST.REPORT.ACTIONS.TYPE.ADDCOMMENT,
                     },
-                    {
-                        created: '2022-11-09 20:00:00.000',
-                        reportActionID: '395268342',
-                        actionName: CONST.REPORT.ACTIONS.TYPE.ADDCOMMENT,
-                        pendingAction: CONST.RED_BRICK_ROAD_PENDING_ACTION.ADD,
-                    },
                 ],
             ],
             [