### 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_
}
    if (!shouldFilterFiber(fiber)) {
      if (messageCountMap != null) {
        messageCountMap.forEach(count => {
          newCount += count;
        });
      }
    }
    pendingFiberToMessageCountMap.delete(fiber);
    return newCount;
  }
  function recordPendingErrorsAndWarnings() {
    clearPendingErrorsAndWarningsAfterDelay();
    fibersWithChangedErrorOrWarningCounts.forEach(fiber => {
      const fiberID = getFiberIDUnsafe(fiber);
      if (fiberID === null) {
         D
      } else {
        const errorCount = mergeMapsAndGetCountHelper(
          fiber,
          fiberID,
          pendingFiberToErrorsMap,
          fiberIDToErrorsMap,
        );
        const warningCount = mergeMapsAndGetCountHelper(
          fiber,
          fiberID,
          pendingFiberToWarningsMap,
          fiberIDToWarningsMap,
        );