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
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          typeof originalError === 'object' &&
          originalError !== null &&
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} else {
  beginWork = originalBeginWork;
}
let didWarnAboutUpdateInRender = false;
let didWarnAboutUpdateInRenderForAnotherComponent;
if (__DEV__) {
  didWarnAboutUpdateInRenderForAnotherComponent = new Set();
}
function warnAboutRenderPhaseUpdatesInDEV(fiber) {