With WebOS app, I’ve noticed sometimes when watching TV shows, if I select one audio track, it will
- go to the next episode
- keep the desired audio track selected
- play the original/nase starting track.
To remedy it, I have to switch from the current selected audio track and back ¯_(ツ)_/¯
As far as possible solutions to bad app behavior on your device - get a separate TV device (roku, etc) or some pc or SBC run a jellyfin app on it. You’d want to research first to see if you could use your existing remote somehow (e.g. maybe an IR receiver)
I think jellyfin offers DLNA support? You could enable it localy and see if your TV(s) can access files that way, without the jellyfin TV app as a middleman