The latest update has caused issues with my band. Got it Tue, Wed. morning work up to a non-responsive band. Left it on the charger while I went to the gym, came back and still nothing. Connecting it to my computer though showed it was still alive and could be synced, but 0% battery (had more than 50% when I went to sleep). It stayed 0% until I disconnected it and did a reset, then it showed about 70% battery. Let it charge more, and after some more resetting and re-pairing to the phone it seemed fine, although during that process it seems whenever the screen went off, the device just powered off because each time I plugged it back it, it asked for the time and date again.
Work up today, still seemed fine. By the time I got to the gym, non-responsive again. Not even the two button reset did anything. Plugged it back into the computer when I got home, computer detects it fine, even says there's 40% battery left (although the band said it ran out of power and asked to reset the time). Didn't do anything and seems to be working again after letting it charge, we'll see what happens when I to go the gym again tonight.
Previously the band had been working flawlessly for me.