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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
componentDidUpdate() {
        Scheduler.unstable_yieldValue('Commit: ' + this.props.text);
      }
      componentDidMount() {
        Scheduler.unstable_yieldValue('Commit: ' + this.props.text);
      }
      render() {
        return (
          <Suspense fallback={<Text text="Loading..." />}>
            <AsyncText ms={20000} text={this.props.text} />
          </Suspense>
        );