https://codesandbox.io/s/upbeat-frost-3tt25

1. Press Suspend, see "Loading..."
2. Wait five seconds, you'll see "Happy birthday" at some point 
3. You won't see it again no matter how long you wait

Expected: you'll see it every five seconds.
Scheduler.unstable_advanceTime(500);
    await advanceTimers(500);
    expect(Scheduler).toHaveYielded(['Promise resolved [B2]']);
    if (
      ReactFeatureFlags.deferPassiveEffectCleanupDuringUnmount &&
      ReactFeatureFlags.runAllPassiveEffectDestroysBeforeCreates
    ) {
      expect(Scheduler).toFlushAndYield([
        'B2',
        'Destroy Layout Effect [Loading...]',
        'Destroy Layout Effect [B]',
        'Layout Effect [B2]',
        'Destroy Effect [Loading...]',
        'Destroy Effect [B]',
        'Effect [B2]',
      ]);
    } else {
      expect(Scheduler).toFlushAndYield([
        'B2',
        'Destroy Layout Effect [Loading...]',
        'Destroy Effect [Loading...]',
        'Destroy Layout Effect [B]',
        'Layout Effect [B2]',
        'Destroy Effect [B]',
        'Effect [B2]',
      ]);
    }
  });
  it('suspends for longer if something took a long (CPU bound) time to render', async () => {
    function Foo({renderContent}) {