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.
} from 'shared/ReactFeatureFlags';
import {unstable_getThreadID} from 'scheduler/tracing';
import {NoPriority} from './SchedulerWithReactIntegration';
import {initializeUpdateQueue} from './ReactUpdateQueue';
import {clearPendingUpdates as clearPendingMutableSourceUpdates} from './ReactMutableSource';
export type PendingInteractionMap = Map<ExpirationTime, Set<Interaction>>;
type BaseFiberRootProperties = {|
  
  tag: RootTag,
  
  containerInfo: any,
  
  pendingChildren: any,
  
  current: Fiber,
  pingCache:
    | WeakMap<Wakeable, Set<ExpirationTime>>
    | Map<Wakeable, Set<ExpirationTime>>
    | null,
  finishedExpirationTime: ExpirationTime,
  
  finishedWork: Fiber | null,
  
  
  timeoutHandle: TimeoutHandle | NoTimeout,
  
  context: Object | null,
  pendingContext: Object | null,
  
  +hydrate: boolean,