### 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 (isTimedOut) {
           S
           g
           i
          const primaryChildFragment = fiber.child;
          const fallbackChildFragment = primaryChildFragment
            ? primaryChildFragment.sibling
            : null;
          const fallbackChild = fallbackChildFragment
            ? fallbackChildFragment.child
            : null;
          if (fallbackChild !== null) {
            mountFiberRecursively(
              fallbackChild,
              shouldIncludeInTree ? fiber : parentFiber,
              true,
              traceNearestHostComponentUpdate,
            );
          }
        } else {
          let primaryChild: Fiber | null = null;
          const areSuspenseChildrenConditionallyWrapped =
            OffscreenComponent === -1;
          if (areSuspenseChildrenConditionallyWrapped) {
            primaryChild = fiber.child;
          } else if (fiber.child !== null) {
            primaryChild = fiber.child.child;
          }
          if (primaryChild !== null) {
            mountFiberRecursively(