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
import {
  warnAboutDeprecatedLifecycles,
  replayFailedUnitOfWorkWithInvokeGuardedCallback,
  enableCreateEventHandleAPI,
  enableProfilerTimer,
  enableProfilerCommitHooks,
  enableProfilerNestedUpdatePhase,
  enableProfilerNestedUpdateScheduledHook,
  deferRenderPhaseUpdateToNextBatch,
  enableDebugTracing,
  enableSchedulingProfiler,
  disableSchedulerTimeoutInWorkLoop,
  enableStrictEffects,
  skipUnmountedBoundaries,
  enableUpdaterTracking,
  enableCache,
  enableTransitionTracing,
} from 'shared/ReactFeatureFlags';
import ReactSharedInternals from 'shared/ReactSharedInternals';
import is from 'shared/objectIs';
import {
  
  scheduleCallback as Scheduler_scheduleCallback,
  cancelCallback as Scheduler_cancelCallback,
  shouldYield,
  requestPaint,
  now,
  ImmediatePriority as ImmediateSchedulerPriority,
  UserBlockingPriority as UserBlockingSchedulerPriority,
  NormalPriority as NormalSchedulerPriority,