Repro case with a master build: https://codesandbox.io/s/stoic-mcnulty-dhygf?file=/src/App.js:668-703

Expected: we see content after a second.
Actual: fallback never resolves.

This happens in a sequence of:

1. Normal update
   - which suspends
2. Idle update
   - which also suspends
3. An unrelated normal update immediately followed by a ping (so they're batched)
   - here, we decide to stay on fallback, but should've shown the content

If you remove `_setVersion(v => v + 1);` on line 44 then the issue goes away.
pushHostRootContext(workInProgress);
  const updateQueue = workInProgress.updateQueue;
  invariant(
    current !== null && updateQueue !== null,
    'If the root does not have an updateQueue, we should have already ' +
      'bailed out. This error is likely caused by a bug in React. Please ' +
      'file an issue.',
  );
  const nextProps = workInProgress.pendingProps;
  const prevState = workInProgress.memoizedState;
  const prevChildren = prevState !== null ? prevState.element : null;
  cloneUpdateQueue(current, workInProgress);
  processUpdateQueue(workInProgress, nextProps, null, renderExpirationTime);
  const nextState = workInProgress.memoizedState;
  
  
  const nextChildren = nextState.element;
  if (nextChildren === prevChildren) {