### 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_
primaryChild,
              shouldIncludeInTree ? fiber : parentFiber,
              true,
              traceNearestHostComponentUpdate,
            );
          }
        }
      } else {
        if (fiber.child !== null) {
          mountFiberRecursively(
            fiber.child,
            shouldIncludeInTree ? fiber : parentFiber,
            true,
            traceNearestHostComponentUpdate,
          );
        }
      }
       W
       I
      updateTrackedPathStateAfterMount(mightSiblingsBeOnTrackedPath);
      fiber = traverseSiblings ? fiber.sibling : null;
    }
  }
   We use this to simulate unmounting for Suspense trees
   when we switch from primary to fallback.
  function unmountFiberChildrenRecursively(fiber: Fiber) {
    if (__DEBUG__) {
      debug('unmountFiberChildrenRecursively()', fiber);
    }
     W