We'd like to know more. What console are you using? Also, mind sharing more details about the issue for us to look into it? Keep us posted.
Oh ok! If you’re playing a video and launch a game using the ‘app switcher’ the console may shut down due to a Microsoft firmware bug (they’re working to fix it). Workaround is to launch the game directly from the Home screen or to exit the video before using the app switcher.