iOS OTA player tries to play 720p OTA channel at 4K and shuts its self down

[ISwearItIsNotMe]

This post looks like it fixed it!

Live TV is not working reliably

Can you browse to the Codecs folder in your Plex data directory. “…/Library/Application Support/Plex Media Server/Codecs” in Linux. Then once you find this folder DELETE EVERYTHING in it. (this is 100% safe) Once you do this try playback and report back here.