message: re-add missing case of codepath
diff: @@ -1076,6 +1076,7 @@ const TimelinePanel = createReactClass({
  if (timeline) {
  // This is a hot-path optimization by skipping a promise tick
  // by repeating a no-op sync branch in TimelineSet.getTimelineForEvent & MatrixClient.getEventTimeline
  + this._timelineWindow.load(eventId, INITIAL_SIZE); // in this branch this method will happen in sync time
  onLoaded();
  } else {
  const prom = this._timelineWindow.load(eventId, INITIAL_SIZE);
  