Does one's Wudu being nullified during the Friday sermon necessitate its immediate renewal or after its conclusion?

If a person's ablution is broken during the Friday sermon, then if he finds a way to exit, he should perform ablution and return to listen. If he does not find a way, he should sit and not step over people's necks, and postpone ablution until after the sermon. As for a person afflicted with urinary incontinence ( سلس البول ), he is not required to perform ablution if his ablution is broken during the sermon, after he has performed ablution for the entry of the prayer time.