### 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_
for (const id of fiberIDToErrorsMap.keys()) {
      const fiber = idToArbitraryFiberMap.get(id);
      if (fiber != null) {
        fibersWithChangedErrorOrWarningCounts.add(fiber);
        updateMostRecentlyInspectedElementIfNecessary(id);
      }
    }
    
    for (const id of fiberIDToWarningsMap.keys()) {
      const fiber = idToArbitraryFiberMap.get(id);
      if (fiber != null) {
        fibersWithChangedErrorOrWarningCounts.add(fiber);
        updateMostRecentlyInspectedElementIfNecessary(id);
      }
    }
    fiberIDToErrorsMap.clear();
    fiberIDToWarningsMap.clear();
    flushPendingEvents();
  }
  function clearMessageCountHelper(