In the past month, my Flex 2 has started messing up my sleep tracking. Some nights it shows no sleep statistics. More strangely, lately it cuts off the tracking several hours before I wake up. For example: It shows I go to sleep at 11pm (correct) and then it shows that I woke up at 2am (incorrect; I actually woke up at 6am.) It's not even an exact difference each time. It's about 3 hours off on the wake time, which made me wonder about a timezone glitch - I'm in the Eastern timezone of the US - but the discrepancy actually varies from night to night. Consistently now off by several hours, just on the wake time. I have restarted it many times. My iOS app is up to date on my phone. Anyone have any ideas?
