My apple watch reboots by itself

Hello, I updated my apple watch series 3 to watch os 7 about 2 weeks ago. Since then, they started to restart at random times. I first noticed this on September 27th. At that moment I was outside. I wanted to see the time, but instead I saw the apple logo. A minute later they started up and started working properly. The second time happened on the same day, but about an hour later. And the third time it happened yesterday (September 29). I find it wrong for my watch to work this way. I also want to emphasize that this did not happen before the update on watch os 7. At the moment I have watch os 7.0.1 installed but the problem is still observed. The option that this is a physical breakdown is excluded, because I bought my apple watch 2 months ago and used it very carefully. I found people on the Internet with an identical problem, but there is no way to solve it. What should I do to fix it?