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**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

expect(
              ReactTestRenderer.create(
                <React.unstable_Profiler id="label" onRender={jest.fn()} />,
              ).toJSON(),
            ).toMatchSnapshot();
            
            expect(
              ReactTestRenderer.create(
                <div>
                  <React.unstable_Profiler id="label" onRender={jest.fn()} />
                </div>,
              ).toJSON(),
            ).toMatchSnapshot();
          });
          it('should render children', () => {
            const FunctionComponent = ({label}) => <span>{label}</span>;
            const renderer = ReactTestRenderer.create(
              <div>
                <span>outside span</span>
                <React.unstable_Profiler id="label" onRender={jest.fn()}>
                  <span>inside span</span>
                  <FunctionComponent label="function component" />
                </React.unstable_Profiler>
              </div>,
            );
            expect(renderer.toJSON()).toMatchSnapshot();
          });
          it('should support nested Profilers', () => {
            const FunctionComponent = ({label}) => <div>{label}</div>;
            class ClassComponent extends React.Component {