Currently we have a problem with Display and AOD environment, some people sometimes use YouTube and lock the device, or just stop using it for a while and when they turn on the screen, everything is black, even the device is logged in, so it is necessary to force reboot. just dropping Twelve and AOD didn't solve the problem, I'm still investigating what it might be (so far no one has provided logs suitable about it), so for now I just ask you to disable AOD and display environment via the QS tile, that will solve the problem.