Fix flaky test UnreadIndicatorsTest

Author: nkdengineer

tests/ui/UnreadIndicatorsTest.tsx

@@ -187,10 +187,12 @@ describe('Unread Indicators', () => {
 
     beforeEach(() => {
         jest.clearAllMocks();
-        Onyx.clear();
-
+    
+        global.fetch = TestHelper.getGlobalFetchMock();
         // Unsubscribe to pusher channels
         PusherHelper.teardown();
+    
+        return Onyx.clear().then(waitForBatchedUpdates);
     });
 
     it('Display bold in the LHN for unread chat and new line indicator above the chat message when we navigate to it', () =>