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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
ReactNoop.expire(4999);
    expect(Scheduler).toFlushWithoutYielding();
    expect(ReactNoop.getChildren()).toEqual([span('S')]);
    
    React.unstable_withSuspenseConfig(
      () => ReactNoop.render(<App text="B" />),
      {
        timeoutMs: 10000,
      },
    );
    
    expect(Scheduler).toFlushAndYield(['Suspend! [B]', 'Loading...']);
    expect(ReactNoop.getChildren()).toEqual([span('S')]);
    
    
    ReactNoop.render(<App text="C" />);
    expect(Scheduler).toFlushAndYield(['C']);
    expect(ReactNoop.getChildren()).toEqual([span('C')]);
    await advanceTimers(10000);
    
    expect(Scheduler).toHaveYielded([
      'Promise resolved [A]',
      'Promise resolved [B]',
    ]);
    
    expect(Scheduler).toFlushWithoutYielding();
    expect(ReactNoop.getChildren()).toEqual([span('C')]);
  });
  it('flushes all expired updates in a single batch', async () => {
    class Foo extends React.Component {