My main complaint is when it decides to just stop casting to Chromecast in the middle of episodes randomly - then I have to open the app, reconnect, and resume.
Also I find the Chromecast controls stop responding frequently making it so I can’t pause what I’m watching - it’ll like disconnect from the Chromecast but keep playing.
My partner also complains about lots of bugs on the iOS app.
Yes I do this. Same exact library folders so I can let my friends use whatever they prefer. If everything is named in a Plex friendly way it should just work in jellyfin.