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.
let info = '';
      const ownerName = getCurrentFiberOwnerNameInDevOrNull();
      if (ownerName) {
        info += '\n\nCheck the render method of `' + ownerName + '`.';
      }
      let warningKey = ownerName || workInProgress._debugID || '';
      const debugSource = workInProgress._debugSource;
      if (debugSource) {
        warningKey = debugSource.fileName + ':' + debugSource.lineNumber;
      }
      if (!didWarnAboutFunctionRefs[warningKey]) {
        didWarnAboutFunctionRefs[warningKey] = true;
        console.error(
          'Function components cannot be given refs. ' +
            'Attempts to access this ref will fail. ' +
            'Did you mean to use React.forwardRef()?%s',
          info,
        );
      }
    }
    if (
      warnAboutDefaultPropsOnFunctionComponents &&
      Component.defaultProps !== undefined
    ) {
      const componentName = getComponentName(Component) || 'Unknown';
      if (!didWarnAboutDefaultPropsOnFunctionComponent[componentName]) {
        console.error(
          '%s: Support for defaultProps will be removed from function components ' +
            'in a future major release. Use JavaScript default parameters instead.',
          componentName,