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.
: resolveDefaultProps(Component, unresolvedProps);
      return mountIncompleteClassComponent(
        current,
        workInProgress,
        Component,
        resolvedProps,
        renderExpirationTime,
      );
    }
    case SuspenseListComponent: {
      return updateSuspenseListComponent(
        current,
        workInProgress,
        renderExpirationTime,
      );
    }
    case FundamentalComponent: {
      if (enableFundamentalAPI) {
        return updateFundamentalComponent(
          current,
          workInProgress,
          renderExpirationTime,
        );
      }
      break;
    }
    case ScopeComponent: {
      if (enableScopeAPI) {
        return updateScopeComponent(
          current,