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.
await ReactNoop.act(async () => {
      transitionToPage('C');
      
      
      Scheduler.unstable_advanceTime(600);
      await advanceTimers(600);
      expect(Scheduler).toFlushAndYield(['B', 'L', 'C']);
      
      
      
      expect(ReactNoop.getChildren()).toEqual([span('B'), span('L')]);
      Scheduler.unstable_advanceTime(400);
      await advanceTimers(400);
      expect(ReactNoop.getChildren()).toEqual([span('C')]);
    });
    await ReactNoop.act(async () => {
      transitionToPage('D');
      
      
      Scheduler.unstable_advanceTime(1000);
      await advanceTimers(1000);
      expect(Scheduler).toFlushAndYield(['C', 'L', 'D']);
      
      
      expect(ReactNoop.getChildren()).toEqual([span('D')]);
    });
  });
  it("suspended commit remains suspended even if there's another update at same expiration", async () => {
    
    function App({text}) {