Mac mini (Mojave) thinks it restarted because of a problem, but was shutdown normally

I have a strange situation with my mom's Mac Mini. When she boots the system, it often says that the system restarted because of an error -- even when it was shutdown normally (e.g. Apple menu -> Shutdown)

This seems to have started around 3 weeks ago and become more frequent of late. There are no apps that show as needing updates, though I did have her update Zoom today knowing that it doesn't automatically update.

I have attached two panic reports. They look fairly identical to my semi-trained eye.

Any advice as to what could cause this? Again, I'll emphasize that the system is NOT crashing or restarting...but it seems to think that it is.