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
return updateLane;
  }
   This update originated outside React. Ask the host environment for an
   appropriate priority, based on the type of event.
  
  
  
  
  const eventLane: Lane = (getCurrentEventPriority(): any);
  return eventLane;
}
function requestRetryLane(fiber: Fiber) {
  
  
   
  
  const mode = fiber.mode;
  if ((mode & ConcurrentMode) === NoMode) {
    return (SyncLane: Lane);
  }
  return claimNextRetryLane();
}
export function scheduleUpdateOnFiber(
  fiber: Fiber,
  lane: Lane,
  eventTime: number,
): FiberRoot | null {
  checkForNestedUpdates();
  if (__DEV__) {
    if (isRunningInsertionEffect) {