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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
state = {suspend: false};
      render() {
        foo = this;
        if (this.state.suspend) {
          Scheduler.unstable_yieldValue('Suspend!');
          throw thenable;
        }
        return <Text text="Foo" />;
      }
    }
    const root = ReactNoop.createRoot();
    await ReactNoop.act(async () => {
      root.render(<App />);
    });
    expect(Scheduler).toHaveYielded(['Foo']);
    await ReactNoop.act(async () => {
      foo.setState({suspend: true});
      
      
      
      expect(Scheduler).toFlushAndYieldThrough(['Suspend!']);
      
      
      foo.setState({suspend: false});
    });
    expect(Scheduler).toHaveYielded(['Foo']);
    expect(root).toMatchRenderedOutput(<span prop="Foo" />);
  });
  it('should not render hidden content while suspended on higher pri', async () => {
    function Offscreen() {