Tuo kuulostaa enemmänkin siltä "virransäästötilalta", joka tulee kun ohjaimeen ei koske hetkeen, joten jos se kesken pelaamisen tulee, niin lienee joku bugi ja ehkä konsolin boottaus auttaisi.
Edit: googlesta kaivettuna tuohon idle modeen:
Change Xbox One Automatic Screen Dimming Time
If you prefer to let your Xbox One dim the screen automatically after a certain period of inactivity, you can change that option in Settings. Just head to Settings > Preferences > Idle Options.
Here, you can change the amount of time before the Xbox One will dim the screen, with options of 2, 10, 20, 30, 45, and 60 minutes. You can also use the option on the left to disable the aforementioned idle notifications if you prefer a more private experience.