I have been having an issue for the past week or so where Channels DVR will randomly close on my Nvidia Shield and my Shield will go to the home screen. I can't pinpoint if anything specific is causing this. It started happening around the same time that I updated my Shield software to 8.2, updated my Channels DVR server (on Synolgy NAS), and started using the Beta app in order to use the Harmony remote buttons.
I posted my log here: