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
}
      if (returnFiber !== null) {
         
        returnFiber.flags |= Incomplete;
        returnFiber.subtreeFlags = NoFlags;
        returnFiber.deletions = null;
      } else {
         
        workInProgressRootExitStatus = RootDidNotComplete;
        workInProgress = null;
        return;
      }
    }
    const siblingFiber = completedWork.sibling;
    if (siblingFiber !== null) {
       
      workInProgress = siblingFiber;
      return;
    }
     
    completedWork = returnFiber;
     
    workInProgress = completedWork;
  } while (completedWork !== null);
   
  if (workInProgressRootExitStatus === RootInProgress) {
    workInProgressRootExitStatus = RootCompleted;
  }
}
function commitRoot(