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
root.timeoutHandle = scheduleTimeout(
            commitRoot.bind(
              null,
              root,
              workInProgressRootRecoverableErrors,
              workInProgressTransitions,
            ),
            msUntilTimeout,
          );
          break;
        }
      }
       
      commitRoot(
        root,
        workInProgressRootRecoverableErrors,
        workInProgressTransitions,
      );
      break;
    }
    case RootSuspendedWithDelay: {
      markRootSuspended(root, lanes);
      if (includesOnlyTransitions(lanes)) {
         
         
         
        break;
      }
      if (!shouldForceFlushFallbacksInDEV()) {