If I wake the screen when my phone is locked, it should take five seconds or so to dim again, but instead I'm usually finding it takes as long as it would if the phone were unlocked. I've tried booting in safe mode but it didn't solved the problem, so it can't be app-related unless it's something to do with one of Google's own. Maps and Gmail both got updates yesterday, although I'm not sure that's when the problem began. Anyone having the same problem? Or have any ideas what could be causing it?