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.
current,
          workInProgress,
          renderExpirationTime,
        );
         
         
        workInProgress.memoizedState = updateSuspenseState(
          current.memoizedState,
          renderExpirationTime,
        );
        workInProgress.child = primaryChildFragment;
        return fallbackChildFragment;
      } else {
         
         
        const nextPrimaryChildren = nextProps.children;
        const currentPrimaryChild = currentPrimaryChildFragment.child;
        const primaryChild = reconcileChildFibers(
          workInProgress,
          currentPrimaryChild,
          nextPrimaryChildren,
          renderExpirationTime,
        );
         
         
         
         
         
         
        workInProgress.memoizedState = null;