On Sun, 28 Mar 2021, Stuart Henderson wrote:
It is something that could possibly be caused by bad hardware or a glitch in the power feed amongst other options (the latter may affect some machines differently than others)..
I've had a string of power "blips" over the last year or so. Oddly enough, the OpenBSD machine always stays up and a Debian machine next to it on the same power strip reboots. I always figured it was due to the superior operating system ;)