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.
const prevState: null | SuspenseState = current.memoizedState;
    if (prevState !== null) {
      if (enableSuspenseServerRenderer) {
        const dehydrated = prevState.dehydrated;
        if (dehydrated !== null) {
          if (!didSuspend) {
            return updateDehydratedSuspenseComponent(
              current,
              workInProgress,
              dehydrated,
              prevState,
              renderExpirationTime,
            );
          } else if (
            (workInProgress.memoizedState: null | SuspenseState) !== null
          ) {
             
             
            workInProgress.child = current.child;
             
             
            workInProgress.effectTag |= DidCapture;
            return null;
          } else {
             
             
             
             
            const nextFallbackChildren = nextProps.fallback;