Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh

Repro: type "a" and then after a second "b"

Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.

Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
span('Sync'),
      span('Loading outer...'),
    ]);
    
    ReactNoop.expire(300);
    await advanceTimers(300);
    expect(Scheduler).toHaveYielded(['Promise resolved [Outer content]']);
    expect(Scheduler).toFlushAndYield([
      'Outer content',
      'Suspend! [Inner content]',
      'Loading inner...',
    ]);
    
    expect(ReactNoop.getChildren()).toEqual([
      span('Sync'),
      span('Loading outer...'),
    ]);
    
    ReactNoop.expire(500);
    await advanceTimers(500);
    
    
    expect(ReactNoop.getChildren()).toEqual([
      span('Sync'),
      span('Outer content'),
      span('Loading inner...'),
    ]);
    
    ReactNoop.expire(1000);
    await advanceTimers(1000);