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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
let [show, setShow] = React.useState(false);
      _setShow = setShow;
      return (
        <Suspense fallback="Loading...">
          {show && <AsyncText text="A" />}
        </Suspense>
      );
    }
    await ReactNoop.act(async () => {
      ReactNoop.render(<App />);
    });
    
    await ReactNoop.act(async () => _setShow(true));
    expect(Scheduler).toHaveYielded(['Suspend! [A]']);
    await resolveText('A');
    expect(Scheduler).toHaveYielded(['Promise resolved [A]']);
  });
  it('shows the parent fallback if the inner fallback should be avoided', async () => {
    function Foo({showC}) {