<!--
  Note: if the issue is about documentation or the website, please file it at:
  https://github.com/reactjs/reactjs.org/issues/new
-->

**Do you want to request a *feature* or report a *bug*?**
bug, I believe, unless I misunderstand how it works
**What is the current behavior?**
Given a `Suspense` inside `Suspense` case like
```
<Suspense fallback="Fallback 1">
  <LazyText1 text="First text" />
  <Suspense fallback="Fallback 2">
    <LazyText2 text="Second text!" />
  </Suspense>
</Suspense>
```

Promises in `LazyTexts` start resolving at the same time, but if `LazyText2` is resolved first it never renders, `Fallback 2` stays.

Result:
```
First text

Fallback 2
```

Please see https://codesandbox.io/s/234o4zry7n

**What is the expected behavior?**

Every `LazyText` displayed in the end
```
First text

Second text!
```

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
react, react-dom 16.6.0

} else {
        newDidTimeout = newState.didTimeout;
        if (newDidTimeout) {
          primaryChildParent = finishedWork.child;
          newState.alreadyCaptured = false;
          if (newState.timedOutAt === NoWork) {
            
            
            
            newState.timedOutAt = requestCurrentTime();
          }
        }
      }
      if (newDidTimeout !== oldDidTimeout && primaryChildParent !== null) {
        hideOrUnhideAllChildren(primaryChildParent, newDidTimeout);
      }
      return;
    }
    case IncompleteClassComponent:
      break;
    default: {
      invariant(
        false,
        'This unit of work tag should not have side-effects. This error is ' +
          'likely caused by a bug in React. Please file an issue.',
      );
    }
  }
}
function hideOrUnhideAllChildren(finishedWork, isHidden) {