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.
);
    }
    adoptClassInstance(workInProgress, value);
    mountClassInstance(workInProgress, Component, props, renderExpirationTime);
    return finishClassComponent(
      null,
      workInProgress,
      Component,
      true,
      hasContext,
      renderExpirationTime,
    );
  } else {
    
    workInProgress.tag = FunctionComponent;
    if (__DEV__) {
      if (disableLegacyContext && Component.contextTypes) {
        console.error(
          '%s uses the legacy contextTypes API which is no longer supported. ' +
            'Use React.createContext() with React.useContext() instead.',
          getComponentName(Component) || 'Unknown',
        );
      }
      if (
        debugRenderPhaseSideEffectsForStrictMode &&
        workInProgress.mode & StrictMode
      ) {
        disableLogs();
        try {
          value = renderWithHooks(