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.
workInProgress: Fiber,
  renderExpirationTime: ExpirationTime,
): Fiber | null {
  cancelWorkTimer(workInProgress);
  if (current !== null) {
     
    workInProgress.dependencies = current.dependencies;
  }
  if (enableProfilerTimer) {
     
    stopProfilerTimerIfRunning(workInProgress);
  }
  const updateExpirationTime = workInProgress.expirationTime;
  if (updateExpirationTime !== NoWork) {
    markUnprocessedUpdateTime(updateExpirationTime);
  }
   Check if the children have any pending work.
  const childExpirationTime = workInProgress.childExpirationTime;
  if (childExpirationTime < renderExpirationTime) {
     
     
     
    return null;
  } else {
     
     
    cloneChildFibers(current, workInProgress);
    return workInProgress.child;
  }
}