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.
state = {step: 1};
        render() {
          return <AsyncText ms={100} text={`Step: ${this.state.step}`} />;
        }
      }
      function Spinner() {
        return (
          <Fragment>
            <Text text="Loading (1)" />
            <Text text="Loading (2)" />
            <Text text="Loading (3)" />
          </Fragment>
        );
      }
      const text = React.createRef(null);
      function App() {