Merge pull request #50110 from situchan/fix-50069

[CP Staging] fix wrong last message in LHN after message deletion

(cherry picked from commit 312fdec)

(CP triggered by Beamanator)

Author: Beamanator

src/libs/OptionsListUtils.ts

@@ -317,11 +317,11 @@ Onyx.connect({
 
             const firstReportAction = sortedReportActions.at(0);
             if (!firstReportAction) {
-                return;
+                delete lastReportActions[reportID];
+            } else {
+                lastReportActions[reportID] = firstReportAction;
             }
 
-            lastReportActions[reportID] = firstReportAction;
-
             // The report is only visible if it is the last action not deleted that
             // does not match a closed or created state.
             const reportActionsForDisplay = sortedReportActions.filter(
@@ -334,6 +334,7 @@ Onyx.connect({
             );
             const reportActionForDisplay = reportActionsForDisplay.at(0);
             if (!reportActionForDisplay) {
+                delete lastVisibleReportActions[reportID];
                 return;
             }
             lastVisibleReportActions[reportID] = reportActionForDisplay;

src/libs/SidebarUtils.ts

@@ -51,6 +51,7 @@ Onyx.connect({
 
         const reportAction = reportActionsForDisplay.at(-1);
         if (!reportAction) {
+            delete visibleReportActionItems[reportID];
             return;
         }
         visibleReportActionItems[reportID] = reportAction;