Improved threads stability (#7639)

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/rooms/EventTile.tsx

@@ -383,7 +383,8 @@ export default class EventTile extends React.Component<IProps, IState> {
     constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);
 
-        const thread = this.props.mxEvent?.getThread();
+        const room = MatrixClientPeg.get().getRoom(this.props.mxEvent.getRoomId());
+        const thread = room.threads?.get(this.props.mxEvent.getId());
 
         this.state = {
             // Whether the action bar is focused.