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.
);
    expect(Scheduler).toFlushAndYield([]);
    ReactNoop.render(
      <Fragment>
        <Suspense fallback={<Text text="Loading..." />}>
          <AsyncText text="Async" ms={20000} />
        </Suspense>
        <Text text="Sync" />
      </Fragment>,
    );
    expect(Scheduler).toFlushAndYield([
      
      'Suspend! [Async]',
      
      'Loading...',
      
      'Sync',
    ]);
    
    expect(ReactNoop.getChildren()).toEqual([]);
    
    
    ReactNoop.expire(10000);
    await advanceTimers(10000);
    
    
    expect(Scheduler).toHaveYielded([]);
    
    expect(ReactNoop.getChildren()).toEqual([span('Loading...'), span('Sync')]);