I just restarted the shield to factory defaults hoping that this issue would go away... it didn't.
I started my plex server, added my NAS as a network folder. Shield is currently indexing all the titles, but if I try to play a movie/tv show, the screen goes black and it just goes back to the previous screen with the details of the video.
It's like it tries to play but something kicks it back.
Same behavior I had before resetting the Shield.
Funny thing, everything works via Kodi.
What's going on? Anyone with the same issues?