Yep, I only noticed because I got prompted to update when I ran it today!

Oh actually it looks like maybe it’s fixed. The issue was closed 5 hours ago https://github.com/jellyfin/jellyfin-uwp/issues/39

Edit: I’m confused. I’m not sure what the media player has to do with the Xbox app.

I second this question. Last I heard the app update needed to be approved for the Microsoft Store.