diff --git a/src/libs/SidebarUtils.ts b/src/libs/SidebarUtils.ts
index 246dccec4662..c0d0c9020a64 100644
--- a/src/libs/SidebarUtils.ts
+++ b/src/libs/SidebarUtils.ts
@@ -6,6 +6,7 @@ import CONST from '@src/CONST';
 import ONYXKEYS from '@src/ONYXKEYS';
 import type {PersonalDetails, PersonalDetailsList, ReportActions, TransactionViolation} from '@src/types/onyx';
 import type Beta from '@src/types/onyx/Beta';
+import type {ChangeLog} from '@src/types/onyx/OriginalMessage';
 import type Policy from '@src/types/onyx/Policy';
 import type PriorityMode from '@src/types/onyx/PriorityMode';
 import type Report from '@src/types/onyx/Report';
@@ -324,26 +325,30 @@ function getOptionData({
         ReportUtils.isThread(report) && lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.ADD_COMMENT && lastAction?.pendingAction !== CONST.RED_BRICK_ROAD_PENDING_ACTION.DELETE;
 
     if ((result.isChatRoom || result.isPolicyExpenseChat || result.isThread || result.isTaskReport || isThreadMessage) && !result.isArchivedRoom) {
+        const lastActionName = lastAction?.actionName ?? report.lastActionType;
+
         if (lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.RENAMED) {
             const newName = lastAction?.originalMessage?.newName ?? '';
             result.alternateText = Localize.translate(preferredLocale, 'newRoomPage.roomRenamedTo', {newName});
         } else if (ReportActionsUtils.isTaskAction(lastAction)) {
             result.alternateText = ReportUtils.formatReportLastMessageText(TaskUtils.getTaskReportActionMessage(lastAction).text);
         } else if (
-            lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.INVITE_TO_ROOM ||
-            lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.REMOVE_FROM_ROOM ||
-            lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.INVITE_TO_ROOM ||
-            lastAction?.actionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.REMOVE_FROM_ROOM
+            lastActionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.INVITE_TO_ROOM ||
+            lastActionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.REMOVE_FROM_ROOM ||
+            lastActionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.INVITE_TO_ROOM ||
+            lastActionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.REMOVE_FROM_ROOM
         ) {
-            const targetAccountIDs = lastAction?.originalMessage?.targetAccountIDs ?? [];
+            const lastActionOriginalMessage = lastAction?.actionName ? (lastAction?.originalMessage as ChangeLog) : null;
+            const targetAccountIDs = lastActionOriginalMessage?.targetAccountIDs ?? [];
+            const targetAccountIDsLength = targetAccountIDs.length !== 0 ? targetAccountIDs.length : report.lastMessageHtml?.match(/<mention-user[^>]*><\/mention-user>/g)?.length ?? 0;
             const verb =
-                lastAction.actionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.INVITE_TO_ROOM || lastAction.actionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.INVITE_TO_ROOM
+                lastActionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.INVITE_TO_ROOM || lastActionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.INVITE_TO_ROOM
                     ? Localize.translate(preferredLocale, 'workspace.invite.invited')
                     : Localize.translate(preferredLocale, 'workspace.invite.removed');
-            const users = Localize.translate(preferredLocale, targetAccountIDs.length > 1 ? 'workspace.invite.users' : 'workspace.invite.user');
-            result.alternateText = `${lastActorDisplayName} ${verb} ${targetAccountIDs.length} ${users}`.trim();
+            const users = Localize.translate(preferredLocale, targetAccountIDsLength > 1 ? 'workspace.invite.users' : 'workspace.invite.user');
+            result.alternateText = `${lastActorDisplayName} ${verb} ${targetAccountIDsLength} ${users}`.trim();
 
-            const roomName = lastAction?.originalMessage?.roomName ?? '';
+            const roomName = lastActionOriginalMessage?.roomName ?? '';
             if (roomName) {
                 const preposition =
                     lastAction.actionName === CONST.REPORT.ACTIONS.TYPE.ROOM_CHANGE_LOG.INVITE_TO_ROOM || lastAction.actionName === CONST.REPORT.ACTIONS.TYPE.POLICY_CHANGE_LOG.INVITE_TO_ROOM
diff --git a/src/types/onyx/Report.ts b/src/types/onyx/Report.ts
index ec1cccf19faf..2c765be70248 100644
--- a/src/types/onyx/Report.ts
+++ b/src/types/onyx/Report.ts
@@ -150,6 +150,9 @@ type Report = OnyxCommon.OnyxValueWithOfflineFeedback<
         displayName?: string;
         lastMessageHtml?: string;
         lastActorAccountID?: number;
+
+        // The type of the last action
+        lastActionType?: ValueOf<typeof CONST.REPORT.ACTIONS.TYPE>;
         ownerAccountID?: number;
         ownerEmail?: string;
         participants?: Participants;