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.
}
    currentPendingTransitionCallbacks.markerProgress.set(markerName, {
      pendingBoundaries,
      transitions,
    });
  }
}
export function addMarkerIncompleteCallbackToPendingTransition(
  markerName: string,
  transitions: Set<Transition>,
  aborts: Array<TransitionAbort>,
) {
  if (enableTransitionTracing) {
    if (currentPendingTransitionCallbacks === null) {
      currentPendingTransitionCallbacks = {
        transitionStart: null,
        transitionProgress: null,
        transitionComplete: null,
        markerProgress: null,
        markerIncomplete: new Map(),
        markerComplete: null,
      };
    }
    if (currentPendingTransitionCallbacks.markerIncomplete === null) {
      currentPendingTransitionCallbacks.markerIncomplete = new Map();
    }
    currentPendingTransitionCallbacks.markerIncomplete.set(markerName, {
      transitions,
      aborts,
    });