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
export function addTransitionCompleteCallbackToPendingTransition(
  transition: TransitionObject,
) {
  if (enableTransitionTracing) {
    if (currentPendingTransitionCallbacks === null) {
      currentPendingTransitionCallbacks = {
        transitionStart: null,
        transitionComplete: [],
      };
    }
    if (currentPendingTransitionCallbacks.transitionComplete === null) {
      currentPendingTransitionCallbacks.transitionComplete = [];
    }
    currentPendingTransitionCallbacks.transitionComplete.push(transition);
  }
}
function resetRenderTimer() {
  workInProgressRootRenderTargetTime = now() + RENDER_TIMEOUT_MS;
}
export function getRenderTargetTime(): number {
  return workInProgressRootRenderTargetTime;
}
let hasUncaughtError = false;
let firstUncaughtError = null;
let legacyErrorBoundariesThatAlreadyFailed: Set<mixed> | null = null;
 Only used when enableProfilerNestedUpdateScheduledHook is true;
 to track which root is currently committing layout effects.
let rootCommittingMutationOrLayoutEffects: FiberRoot | null = null;
let rootDoesHavePassiveEffects: boolean = false;
let rootWithPendingPassiveEffects: FiberRoot | null = null;