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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
Scheduler.unstable_yieldValue(props.text);
    return <span prop={props.text} ref={props.hostRef} />;
  }
  function AsyncText(props) {
    const text = props.text;
    try {
      readText(text);
      Scheduler.unstable_yieldValue(text);
      return <span prop={text} />;
    } catch (promise) {
      if (typeof promise.then === 'function') {
        Scheduler.unstable_yieldValue(`Suspend! [${text}]`);
        if (typeof props.ms === 'number' && promise._timer === undefined) {
          promise._timer = setTimeout(() => {
            resolveText(text);
          }, props.ms);
        }
      } else {
        Scheduler.unstable_yieldValue(`Error! [${text}]`);
      }
      throw promise;
    }
  }
  it('does not restart rendering for initial render', async () => {
    function Bar(props) {