### 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).toMatchSnapshot('1: mount');
      act(() =>
        legacyRender(
          <React.Fragment>
            <Parent count={2} />
            <Parent count={1} />
          </React.Fragment>,
          container,
        ),
      );
      expect(store).toMatchSnapshot('2: update');
      act(() => ReactDOM.unmountComponentAtNode(container));
      expect(store).toMatchSnapshot('3: unmount');
    });
    it('should support mount and update operations for multiple roots', () => {
      const Parent = ({count}) =>
        new Array(count).fill(true).map((_, index) => <Child key={index} />);
      const Child = () => <div>Hi!</div>;
      const containerA = document.createElement('div');
      const containerB = document.createElement('div');
      act(() => {
        legacyRender(<Parent key="A" count={3} />, containerA);
        legacyRender(<Parent key="B" count={2} />, containerB);
      });
      expect(store).toMatchSnapshot('1: mount');
      act(() => {
        legacyRender(<Parent key="A" count={4} />, containerA);
        legacyRender(<Parent key="B" count={1} />, containerB);