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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
constructor(props) {
          super(props);
          const text = props.text;
          Scheduler.unstable_yieldValue('constructor');
          try {
            readText(text);
            this.state = {text};
          } catch (promise) {
            if (typeof promise.then === 'function') {
              Scheduler.unstable_yieldValue(`Suspend! [${text}]`);
            } else {
              Scheduler.unstable_yieldValue(`Error! [${text}]`);
            }
            throw promise;
          }
        }
        componentDidMount() {