### 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).toMatchInlineSnapshot(`
        ✕ 2, ⚠ 2
        [root]
            <Example> ✕⚠
            <Example> ✕⚠
      `);
      const {
        clearErrorsAndWarnings,
      } = require('react-devtools-shared/src/backendAPI');
      clearErrorsAndWarnings({bridge, store});
      // flush events to the renderer
      jest.runAllTimers();
      expect(store).toMatchInlineSnapshot(`
        [root]
            <Example>
            <Example>
      `);
    });
    it('can be cleared for particular Fiber (only warnings)', () => {
      function Example() {
        console.error('test-only: render error');
        console.warn('test-only: render warning');
        return null;
      }
      const container = document.createElement('div');
      withErrorsOrWarningsIgnored(['test-only:'], () => {
        act(() =>
          legacyRender(
            <React.Fragment>