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.
cloneChildFibers,
} from './ReactChildFiber';
import {
  processUpdateQueue,
  cloneUpdateQueue,
  initializeUpdateQueue,
} from './ReactUpdateQueue';
import {
  NoWork,
  Never,
  Sync,
  computeAsyncExpiration,
} from './ReactFiberExpirationTime';
import {
  ConcurrentMode,
  NoMode,
  ProfileMode,
  StrictMode,
  BlockingMode,
} from './ReactTypeOfMode';
import {
  shouldSetTextContent,
  shouldDeprioritizeSubtree,
  isSuspenseInstancePending,
  isSuspenseInstanceFallback,
  registerSuspenseInstanceRetry,
} from './ReactFiberHostConfig';
import type {SuspenseInstance} from './ReactFiberHostConfig';
import {shouldSuspend} from './ReactFiberReconciler';
import {pushHostContext, pushHostContainer} from './ReactFiberHostContext';