It only happens on my S7, or after the new update the clock automatically reboots. It has happened to me 2 times since I updated.
Not for me.
@luca760101 What are you doing with the watch when it reboots?
Nothing, in fact for this I was amazed. No possible overload of the proceasor with particular apps. I had also thought of prolonged involuntary pressure on the top left button, but it didn’t happen.