i recently installed a new , more powerfull plex server. re-addded my libraries. all seemed fine untill i tried to play music from the recently added list. completely froze the app, had to kill it manually. I can access anything through the libraries and recently added movie list works fine. Any ideas ?
if it was a recent install did you do an optimize after your libraries finished scanning and such
https://forums.plex.tv/discussion/223476/any-update-on-2-6-1-fix#latest this could also be an answer to your problem. The Xbox One app has a known issue and plex employees are working on it. A fix has been submitted to Microsoft but has not yet been pushed.