Batched state changes are not flushed if the promise code changes the DOM (= attaching an iframe). Reproduceable with Safari.

React version: 18.1.0

## Steps To Reproduce

1. Open [codepen](https://codepen.io/kh-viewar/pen/wvpVLxM) with Safari.
2. Click "Upload"
3. => "Spinner" text does not render while Promise is in pending

Link to code example:

https://codepen.io/kh-viewar/pen/wvpVLxM

## The current behavior

State changes are not executed.

## The expected behavior

State should change to true and render spinner component. After promise is resolved (2 seconds timeout), state should switch back to false and spinner component should unmount.

## Original discussion

https://github.com/facebook/react/issues/24365
workInProgressTransitions,
      );
      break;
    }
    case RootCompleted: {
       
      commitRoot(
        root,
        workInProgressRootRecoverableErrors,
        workInProgressTransitions,
      );
      break;
    }
    default: {
      throw new Error('Unknown root exit status.');
    }
  }
}
function isRenderConsistentWithExternalStores(finishedWork: Fiber): boolean {
   
   
   
  let node: Fiber = finishedWork;
  while (true) {
    if (node.flags & StoreConsistency) {
      const updateQueue: FunctionComponentUpdateQueue | null = (node.updateQueue: any);
      if (updateQueue !== null) {
        const checks = updateQueue.stores;
        if (checks !== null) {
          for (let i = 0; i < checks.length; i++) {