React version: 18.3.0-next-3ba7add60-20221201

Hard to reproduce.

In Next.js, in rare cases, and only after a fast refresh, the ref object when using forwardRef is simply `{}`.

This leads to the `TypeError: can't define property "current": Object is not extensible` error when used with `useImperativeHandle`.

```tsx
function Parent() {
  const carouselRef = useRef<any>();

  return <Suspense><Carousel ref={carouselRef} /></Suspense>
}

const Carousel = forwardRef((props, ref) => {
  if (!('current' in ref)) { debugger; }
  const thing = use(aPromise);
  return ...;
});
```

![Screenshot 2023-03-17 at 18 49 21](https://user-images.githubusercontent.com/5406212/225981809-22f575fa-0ec7-4f94-ae23-bffc8bf7c4dd.png)

In `updateImperativeHandle`, the ref is already an empty object.

![Screenshot 2023-03-17 at 19 13 13](https://user-images.githubusercontent.com/5406212/225985622-b8512a61-3a6b-4958-b63f-277219d4c816.png)

I haven't investigated it further yet, the stacktraces are quite hard to follow.
'Did you mean "collapsed" or "hidden"?',
          tMode,
        );
      } else if (revealOrder !== 'forwards' && revealOrder !== 'backwards') {
        didWarnAboutTOptions[tMode] = true;
        console.error(
          '<SuspenseList t="%s" /> is only valid if revealOrder is ' +
            '"forwards" or "backwards". ' +
            'Did you mean to specify revealOrder="forwards"?',
          tMode,
        );
      }
    }
  }
}
function validateSuspenseListNestedChild(childSlot: mixed, index: number) {
  if (__DEV__) {
    const isAnArray = isArray(childSlot);
    const isIterable =
      !isAnArray && typeof getIteratorFn(childSlot) === 'function';
    if (isAnArray || isIterable) {
      const type = isAnArray ? 'array' : 'iterable';
      console.error(
        'A nested %s was passed to row #%s in <SuspenseList />. Wrap it in ' +
          'an additional SuspenseList to configure its revealOrder: ' +
          '<SuspenseList revealOrder=...> ... ' +
          '<SuspenseList revealOrder=...>{%s}</SuspenseList> ... ' +
          '</SuspenseList>',
        type,
        index,