### 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.useEffect(() => {
            console.error('test-only: passive error');
            console.warn('test-only: passive warning');
          });
          return null;
        }
        const container = document.createElement('div');
        withErrorsOrWarningsIgnored(['test-only:'], () => {
          act(() => {
            legacyRender(<Example />, container);
          }, false);
        });
        flushPendingBridgeOperations();
        expect(store).toMatchInlineSnapshot(`
          [root]
              <Example>
        `);
        // After a delay, passive effects should be committed as well
        act(flushPendingPassiveErrorAndWarningCounts, false);
        expect(store).toMatchInlineSnapshot(`
          ✕ 1, ⚠ 1
          [root]
              <Example> ✕⚠
        `);
        act(() => ReactDOM.unmountComponentAtNode(container));
        expect(store).toMatchInlineSnapshot(``);
      });
      it('are flushed early when there is a new commit', () => {
        function Example() {