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.
let [page, setPage] = React.useState('A');
      let [isLoading, startLoading] = useLoadingIndicator(SUSPENSE_CONFIG);
      transitionToPage = nextPage => startLoading(() => setPage(nextPage));
      return (
        <Fragment>
          <Text text={page} />
          {isLoading ? <Text text="L" /> : null}
        </Fragment>
      );
    }
    
    ReactNoop.render(<App />);
    expect(Scheduler).toFlushAndYield(['A']);
    expect(ReactNoop.getChildren()).toEqual([span('A')]);
    await ReactNoop.act(async () => {
      transitionToPage('B');
      
      
      Scheduler.unstable_advanceTime(200);
      await advanceTimers(200);
      expect(Scheduler).toFlushAndYield(['A', 'L', 'B']);
      expect(ReactNoop.getChildren()).toEqual([span('B')]);
    });