### 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_
const supportsTogglingSuspense =
    typeof setSuspenseHandler === 'function' &&
    typeof scheduleUpdate === 'function';
  if (typeof scheduleRefresh === 'function') {
    
    
    
    
    
    
    renderer.scheduleRefresh = (...args) => {
      try {
        hook.emit('fastRefreshScheduled');
      } finally {
        return scheduleRefresh(...args);
      }
    };
  }
  
  
  
  
  
  const fibersWithChangedErrorOrWarningCounts: Set<Fiber> = new Set();
  const pendingFiberToErrorsMap: Map<Fiber, Map<string, number>> = new Map();
  const pendingFiberToWarningsMap: Map<Fiber, Map<string, number>> = new Map();
  
  const fiberIDToErrorsMap: Map<number, Map<string, number>> = new Map();
  const fiberIDToWarningsMap: Map<number, Map<string, number>> = new Map();
  function clearErrorsAndWarnings() {