In the week since I've had my apple watch series 4 cellular, it has randomly restarted several times. The last time it happened was a couple of days ago right after taking it off the charger. It had fully charged, I took it off the charger and set it on my night stand and next thing I see is the apple logo. I think one of the other times it restarted was also after taking it off the charger. Has anyone else had anything like this happen? I am wondering if this is a software or a hardware issue. I haven't come across any information regarding anyone else having experienced this.