I have the same problem. I can’t stand this behavior anymore — I’ve had the watch since October 1st, and every day I have to deal with resets and sensor shutdowns, especially at night when it should be monitoring HRV and sleep.
I’m sending it in for service on Saturday. Since the issue seems limited to a few Vertical 2 units, I hope they’ll replace it.
The battery performance also isn’t great: with one hour of training per day, battery life doesn’t last more than a week.