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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(call[5]).toBe(69); 
        expect(call[6]).toEqual(enableSchedulerTracing ? new Set() : undefined); 
      });
      it('includes render times of nested Profilers in their parent times', () => {
        const callback = jest.fn();
        advanceTimeBy(5); 
        ReactTestRenderer.create(
          <React.Fragment>
            <React.unstable_Profiler id="parent" onRender={callback}>
              <AdvanceTime byAmount={10}>
                <React.unstable_Profiler id="child" onRender={callback}>
                  <AdvanceTime byAmount={20} />
                </React.unstable_Profiler>
              </AdvanceTime>
            </React.unstable_Profiler>
          </React.Fragment>,
        );
        expect(callback).toHaveBeenCalledTimes(2);
        
        const [childCall, parentCall] = callback.mock.calls;
        expect(childCall[0]).toBe('child');
        expect(parentCall[0]).toBe('parent');
        
        expect(childCall[2]).toBe(20); 
        expect(childCall[3]).toBe(20); 
        expect(childCall[4]).toBe(15); 
        expect(childCall[5]).toBe(35); 
        expect(parentCall[2]).toBe(30); 
        expect(parentCall[3]).toBe(30); 
        expect(parentCall[4]).toBe(5);