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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
const [text, _setText] = useState('A');
        setAppText = _setText;
        return (
          <>
            <Suspense fallback={<Fallback />}>
              <AsyncText text={text} />
            </Suspense>
          </>
        );
      }
      let setFallbackText;
      function Fallback() {