Hello, everyonce while, ever since running iOS 8 and 9. Sometimes you can just unlock the device without a passcode. I have Touch ID and a passcode enabled and barely have my finger on the button, it would unlock. But when you lock it, it would enable the passcode again. Fells like a security flaw. I wish I recorded it. I was running. iOS 9.3 Beta 7 at that moment I think. But it has happend on previous firmwares as well.