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.
return (
        <SuspenseList revealOrder="forwards">
          {items.map(name => (
            <Suspense key={name} fallback="Loading">
              {name}
            </Suspense>
          ))}
          <div>Tail</div>
        </SuspenseList>
      );
    }
    ReactNoop.render(<Foo items={['A', 'B']} />);
    expect(() => Scheduler.unstable_flushAll()).toErrorDev([
      'Warning: A nested array was passed to row #0 in <SuspenseList />. ' +
        'Wrap it in an additional SuspenseList to configure its revealOrder: ' +
        '<SuspenseList revealOrder=...> ... ' +
        '<SuspenseList revealOrder=...>{array}</SuspenseList> ... ' +
        '</SuspenseList>' +
        '\n    in SuspenseList (at **)' +
        '\n    in Foo (at **)',
    ]);
  });
  it('shows content independently by default', async () => {
    let A = createAsyncText('A');
    let B = createAsyncText('B');
    let C = createAsyncText('C');
    function Foo() {