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 [startShortTransition, isPending1] = React.useTransition({
        timeoutMs: 5000,
      });
      const [startLongTransition, isPending2] = React.useTransition({
        timeoutMs: 30000,
      });
      const isPending = isPending1 || isPending2;
      const [text, setText] = React.useState('');
      const [mirror, setMirror] = React.useState('');
      if (text !== mirror) {
        
        setMirror(text);
      }
      setTextWithShortTransition = value => {
        startShortTransition(() => {
          setText(value);
        });
      };
      setTextWithLongTransition = value => {