I got the 4.3 update OTA a couple of days ago, and went ahead and let it update. Now however, when my 10 is in sleep mode for an extended period (not sure exactly how long, a couple of hours at least) it won't wake up from either the cover magnet or a short press of the power button. I have to hold the power button and reboot. It works fine after that until I leave it sleeping again for a few hours, then it has to be rebooted again. Anyone else having this problem? I've been thinking about doing a factory reset to see if it fixes the problem, but I'd like to avoid it if possible.