I have a Linux PC with Jellyfin hooked up to the TV but i find it awkward to use with a keyboard and trackpad while lying on the couch. It would be great to have a remote like the Chromecast one but I’m not sure if anything like that is available that would work with JF.

I would start all containers except one. If everything works that one is the cause of the problem. Keep trying with a different container every time.