In-video airplay link broken in iOS and iPadOS

Many videos, YouTube and elsewhere, include an icon to Airplay the video to another device, usually in my case to my Apple TV. However, iOS and iPadOS 18.4 broke this. When I click the icon, I get the option to Airplay, but selecting the desired device does nothing. I can use Airplay in Control Center, and that works just fine. So the issue is not specifically with Airplay, because the icon trick works just fine in macOS. Please, please, do not start posting about fixes. This is NOT something I am doing wrong, it is definitely a bug in the software. I have submitted this to Apple Product support.