When airplaying to Apple TV, I only get sound, no video. If I duplicate the screen, all I get is a still image of the video, and no sound.
After a bit of testing, it is happening with mkv media that has audio codec Dolby Atmos 5.1 or E-AC3 5.1
Mp4 media with audio codec ACC 2.0, works.
Happening on iPhone 15Pro and iPad Pro (M4), both on iOS 26.0.1
No issues on an old iPad with Infuse Pro 7.3