Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh

Repro: type "a" and then after a second "b"

Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.

Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
secondArg: SecondArg,
  nextRenderExpirationTime: ExpirationTime,
): any {
  renderExpirationTime = nextRenderExpirationTime;
  currentlyRenderingFiber = workInProgress;
  if (__DEV__) {
    hookTypesDev =
      current !== null
        ? ((current._debugHookTypes: any): Array<HookType>)
        : null;
    hookTypesUpdateIndexDev = -1;
    
    ignorePreviousDependencies =
      current !== null && current.type !== workInProgress.type;
  }
  workInProgress.memoizedState = null;
  workInProgress.updateQueue = null;
  workInProgress.expirationTime = NoWork;
  
  
  
  
  
  
  
  
  
  
  if (__DEV__) {
    if (current !== null && current.memoizedState !== null) {