### Website or app

https://codesandbox.io/s/react-playground-forked-j4niq

### Repro steps

Emoji seem supported but produce strange symbole

![image](https://user-images.githubusercontent.com/24865815/133793744-55a55582-90ad-425f-8a40-4c061a3c1d80.png)

To test emoji on Window Os, use `[win]+[.]` 🟩


### How often does this bug happen?

Every time

### DevTools package (automated)

_No response_

### DevTools version (automated)

_No response_

### Error message (automated)

_No response_

### Error call stack (automated)

_No response_

### Error component stack (automated)

_No response_

### GitHub query string (automated)

_No response_
<React.Suspense fallback={<Fallback>Loading outer</Fallback>}>
            <Parent />
          </React.Suspense>
        );
      };
      const Fallback = () => null;
      const Parent = () => <Child />;
      const Child = () => null;
      act(() => legacyRender(<SuspenseTree />, document.createElement('div')));
      expect(store).toMatchSnapshot('1: mount');
      act(() => store.toggleIsCollapsed(store.getElementIDAtIndex(0), false));
      act(() => store.toggleIsCollapsed(store.getElementIDAtIndex(1), false));
      expect(store).toMatchSnapshot('2: expand tree');
      const rendererID = getRendererID();
      const suspenseID = store.getElementIDAtIndex(1);
      act(() =>
        agent.overrideSuspense({
          id: suspenseID,
          rendererID,
          forceFallback: true,
        }),
      );
      expect(store).toMatchSnapshot('3: toggle fallback on');
      act(() =>
        agent.overrideSuspense({
          id: suspenseID,
          rendererID,
          forceFallback: false,
        }),
      );