Since the newest update (10.12.3) I've had trouble waking my computer from sleep overnight. During the day it's no problem, so it must be something about the duration that it's out? When I lift the lid, it's a black but backlit screen (and the logo is glowing on the back) and I'm unable to change that without cold booting it. I'd say this has happened 60% of the nights since updating. Anyone else having these problems? Any tips?