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="together">
          {step === 0 && (
            <Suspense fallback={<Text text="Loading A" />}>
              <A />
            </Suspense>
          )}
          {step === 0 && (
            <Suspense fallback={<Text text="Loading B" />}>
              <B />
            </Suspense>
          )}
          {step === 1 && (
            <Suspense fallback={<Text text="Loading C" />}>
              <C />
            </Suspense>
          )}
          {step === 1 && (
            <Suspense fallback={<Text text="Loading D" />}>