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.
<Suspense
              fallback={<Text text={`Loading... Pending: ${isPending}`} />}>
              {show ? (
                <AsyncText ms={2000} text={`After... Pending: ${isPending}`} />
              ) : (
                <Text text={`Before... Pending: ${isPending}`} />
              )}
            </Suspense>
          );
        }
        ReactNoop.render(<App />);
        expect(Scheduler).toFlushAndYield(['Before... Pending: false']);
        expect(ReactNoop.getChildren()).toEqual([
          span('Before... Pending: false'),
        ]);
        act(() => {
          Scheduler.unstable_runWithPriority(
            Scheduler.unstable_UserBlockingPriority,
            transition,
          );
        });
        Scheduler.unstable_advanceTime(500);
        await advanceTimers(500);
        expect(Scheduler).toHaveYielded([
          'Before... Pending: true',
          'Suspend! [After... Pending: false]',
          'Loading... Pending: false',
        ]);
        expect(ReactNoop.getChildren()).toEqual([
          span('Before... Pending: true'),