So... if you were using "cdn.openbsd.org" instead of "country.openbsd.org", you may have missed the following updates:
006: RELIABILITY FIX: June 8, 2021 amd64
Recent Intel or any AMD machines could crash as the kernel did not flush all TLBs that multi threaded processes require.
007: RELIABILITY FIX: June 8, 2021 amd64, i386
Disable PPGTT on Intel machines with cherryview/braswell graphics to avoid memory corruption.
The local mirror in my country works.
#openbsd 🐡
@ParadeGrotesque the upcoming slackware 15 feels like it's going to be a really nice release, many improvements and already quite solid :)