Hello,
Just to add to the hilarious bag of other issues:
My watch just started to buzz constantly when I received a message at the same time when I was scrolling back to the main watch face from a "My health"-widget.
This buzzing did not stop until I visited the store that got the device restarted.
Here's a video about this: https://twitter.com/hansjarvi/status/1192828435737063424
Best regards