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.
expect(ReactNoop.getChildren()).toEqual([span('Loading...'), span('Sync')]);
    
    await resolveText('Async');
    expect(Scheduler).toHaveYielded(['Promise resolved [Async]']);
    expect(Scheduler).toFlushAndYield(['Async']);
    expect(ReactNoop.getChildren()).toEqual([span('Async'), span('Sync')]);
  });
  it('suspending inside an expired expiration boundary will bubble to the next one', async () => {
    ReactNoop.flushSync(() =>
      ReactNoop.render(
        <Fragment>
          <Suspense fallback={<Text text="Loading (outer)..." />}>
            <Suspense fallback={<AsyncText text="Loading (inner)..." />}>
              <AsyncText text="Async" />
            </Suspense>
            <Text text="Sync" />
          </Suspense>
        </Fragment>,
      ),
    );
    expect(Scheduler).toHaveYielded([
      'Suspend! [Async]',
      'Suspend! [Loading (inner)...]',
      'Sync',
      'Loading (outer)...',
    ]);
    
    expect(ReactNoop.getChildren()).toEqual([span('Loading (outer)...')]);
  });
  it('expires early by default', async () => {