Apple Watch Ultra seems to randomly reboot multiple times during the day

Hi, my Apple Watch Ultra (watchOS 9.5.2 (20T571)) appears to reboot 2-3 times during the day, seemingly randomly. Of course, it’s hardly really random, but what I mean is that I’ve noticed it reboot when there was no user input through the watch or my phone and I was just wearing it on my wrist. Is there any way to stop it from doing this? What is causing this?