Just this afternoon, I was shopping and raised the watch and nothing happened. I then raised it again and then tapped the screen...Nothing. Hit the crown with no luck. I decided then to do a hard reboot. watch wouldn't power up. As I got in the car a few minutes later, I hit just the power button and the logo appeared on the screen. It seemed longer that usual to finally come to life. That was about five hours ago. First issue I've had since I got the watch in April. The last app I used was getting a message.
Will watch for the next few days. Glad I bought Applecare+. Also on watch os2.