Repro case with a master build: https://codesandbox.io/s/stoic-mcnulty-dhygf?file=/src/App.js:668-703

Expected: we see content after a second.
Actual: fallback never resolves.

This happens in a sequence of:

1. Normal update
   - which suspends
2. Idle update
   - which also suspends
3. An unrelated normal update immediately followed by a ping (so they're batched)
   - here, we decide to stay on fallback, but should've shown the content

If you remove `_setVersion(v => v + 1);` on line 44 then the issue goes away.
if (props.hide) {
        return <Text text="(empty)" />;
      }
      return (
        <Suspense fallback="Loading...">
          <AsyncText ms={2000} text="Async" />
        </Suspense>
      );
    }
    
    
    ReactNoop.discreteUpdates(() => {
      
      ReactNoop.render(<App />);
    });
    
    ReactNoop.render(<App hide={true} />);
    expect(Scheduler).toFlushAndYield([
      
      'Suspend! [Async]',
      
      '(empty)',
    ]);
    expect(ReactNoop.getChildren()).toEqual([span('(empty)')]);
  });
  it('tries each subsequent level after suspending', async () => {
    const root = ReactNoop.createRoot();
    function App({step, shouldSuspend}) {