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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
return (
        <Suspense fallback={<Text text="Loading..." />}>
          <Text text={props.highPri} />
          <AsyncText text={props.lowPri} />
        </Suspense>
      );
    }