Repro: https://codesandbox.io/s/fast-water-4i4jb

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
componentDidMount() {
          Scheduler.unstable_yieldValue(`Mount [${this.props.text}]`);
        }
        componentDidUpdate() {
          Scheduler.unstable_yieldValue(`Update [${this.props.text}]`);
        }
        render() {
          return <Text {...this.props} />;
        }
      }
      class AsyncTextWithLifecycle extends React.Component {