I've a 32 GB iPod Touch 5th Gen. Okay, a few minutes ago someone added me as a friend on Game Centre, so there's the trumpet notification sound that came along with a notification message on my lock screen, so upon seeing that I immediately slide the Game Centre icon and out of the sudden the Apple logo came up (the same one when you power on your iPhone/iPod), it stayed that way for a good few seconds before showing me the Enter Passcode screen. Nothing out of the ordinary happened; I didn't lose any apps, data or anything like that but that was the first time that sort of things happened. Any idea what causes this? Has anyone experienced such a thing before, or is it a bug with Game Centre?