### 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_
expect(store.getIndexOfElementID(store.getElementIDAtIndex(i))).toBe(i);
      }
    });
    it('should support a single root with multiple top level children', () => {
      const Grandparent = () => <Parent />;
      const Parent = () => <Child />;
      const Child = () => null;
      act(() =>
        legacyRender(
          <React.Fragment>
            <Grandparent />
            <Grandparent />
          </React.Fragment>,
          document.createElement('div'),
        ),
      );
      for (let i = 0; i < store.numElements; i++) {
        expect(store.getIndexOfElementID(store.getElementIDAtIndex(i))).toBe(i);
      }
    });
    it('should support multiple roots with multiple top level children', () => {
      const Grandparent = () => <Parent />;
      const Parent = () => <Child />;
      const Child = () => null;
      act(() => {
        legacyRender(
          <React.Fragment>
            <Grandparent />
            <Grandparent />
          </React.Fragment>,