Mine has similar behavior since V22 (I was on V19, then V20, then V22 and now V23). It's not really turning off, it's just hanging and then timing out so display turns off and it feels like the device is off. Just today I had to reboot it like this more than 10 times. Tried booting in safe mode and it's still the same. Before it hangs, the interface is trying to refresh for a few seconds and then it's not responding, CoDi is reacting to touches, but doesn't pass anything to OS (i.e. fingerprints/PIN entries/etc.) and the only way to return it back is to reboot.