If you're running XOGO Player on an Amazon Fire Stick (or Fire television) please make sure that you have screensavers and "still watching" turned off. Either one of these will cause an interruption to your XOGO playlist, and if one doesn't click on the "still watching" page that pops up after 4hrs, the Fire device will eventually turn off XOGO and go back to its menu screen.
How to Disable Screensavers and "Still Watching"
Disable Screensaver:
Settings > Display & Sounds > Screensaver > Start Time (set to Never)
Disable "Still Watching":
Preferences > Data Usage Monitoring > Still Watching (set to OFF)