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
try {
    ReactCurrentBatchConfig.transition = null;
    setCurrentUpdatePriority(DiscreteEventPriority);
    fn();
  } finally {
    setCurrentUpdatePriority(previousPriority);
    ReactCurrentBatchConfig.transition = prevTransition;
    executionContext = prevExecutionContext;
    if (executionContext === NoContext) {
       
      resetRenderTimer();
      flushSyncCallbacks();
    }
  }
}
export function pushRenderLanes(fiber: Fiber, lanes: Lanes) {
  pushToStack(subtreeRenderLanesCursor, subtreeRenderLanes, fiber);
  subtreeRenderLanes = mergeLanes(subtreeRenderLanes, lanes);
  workInProgressRootIncludedLanes = mergeLanes(
    workInProgressRootIncludedLanes,
    lanes,
  );
}
export function popRenderLanes(fiber: Fiber) {
  subtreeRenderLanes = subtreeRenderLanesCursor.current;
  popFromStack(subtreeRenderLanesCursor, fiber);
}
function prepareFreshStack(root: FiberRoot, lanes: Lanes): Fiber {
  root.finishedWork = null;
  root.finishedLanes = NoLanes;