

As others have said, it’s probably overheating.
That’s a mini, and likely doesn’t have any fans at all (or something perfunctory), so probably won’t handle being run at high cpu for more than a few minutes.
I currently have a small-form-factor pc with the same issue - drive and general box temps were high (drive was 110f, continuous, within range but on the edge). It would randomly reboot.
Replacing the paste on the cpu cooler helped a lot (no more random reboots), but adding a compressor-type fan dropped box temps (and more importantly drive temps), down to room temp.
I think the best you may be able to do is add an external compressor fan with some duct tape.
“Leftist’s warnings”? Perhaps 40 years ago, but it’s come from both sides over the last 20, and yet leftists still pushed for this stuff, as much as anyone.
Language policing is always the tool of whoever is currently in power - they’ll always use it to their advantage.