Video not working on Air Play.

I don’t know if there is a direct correlation, but... shortly after updating to iOS 12 I tried doing something I typically do, airplaying a movie from my phone to my Apple TV. Usually it’s crisp, clear, and amazing. However, since the update (again, I’ve only noticed it since the update but don’t know if there is a correlation) when I go to airplay the Apple TV plays the movie/show as an mp3 file. Audio only, no video. The video continues to play on my phone.

I have done all the typical stuff. Restarted both items, disconnected and reconnected to the internet, updated both, etc., etc..

Anyone got any ideas?

Edit: I’m not sure the exact model but I do have one of the original Apple TVs and have a 7+. Again, this worked perfectly pre-update.0