Yeah that's the one I'm using on our appleTV, it's buggy as hell. "Continue" show often doesn't work and picks an episode that I've watched long ago and not the next in line, often never updating it despite watching several episode over several weeks. Aftee Pausing a show or movie and closing the app, if you want to continue from where you left off, well that doesn't work consistently either, usually it will just restart from the beginning. Switching language on shows pretty much doesn't work at all, it will either never change from default audio language, or use an entirely different language than the one picked from the list.
All these things work perfectly fine from a browser or official app on android.
Jeælyfin also has this, is just doesn't work on appleTV