Do you manually set it to sleep when you go to bed or do you use the sleep schedule? A while back if using the sleep schedule it would show asleep at exactly the start of the schedule regardless if I was in bed or not. To prevent this I started manually setting the watch to sleep only once I was in bed. Lately though after one of the watch updates I noticed the times were off just like you are seeing here. Even though going to bed and setting the sleep function at 12:00 it was saying I was sleeping at 10:00. Makes it very frustrating to use. Sorry I don’t have much to add other than this. Hopefully it gets fixed soon.