Bug 258139

In a virtual machine, VirtualBox 6.1.26 installed FreeBSD 13.0.

uname -a

FreeBSD freebsd 13.0-RELEASE-p4 FreeBSD 13.0-RELEASE-p4 #0: Tue Aug 24 07:33:27 UTC 2021     root@amd64-builder.daemonology.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64

locale

LANG=C.UTF-8
LC_CTYPE="C.UTF-8"
LC_COLLATE="C.UTF-8"
LC_TIME="C.UTF-8"
LC_NUMERIC="C.UTF-8"
LC_MONETARY="C.UTF-8"
LC_MESSAGES="C.UTF-8"
LC_ALL=

echo 'keymap="ru.win"' >> /etc/rc.conf

reboot

Next, I suggest you view the video.
The video contains sublets.
https://youtu.be/U92KdvanNhE

The login console incorrectly perceives the transition to the Russian layout.

Russian characters are not displayed.

Some characters, for example "a" ("ф" - in the Russian layout) are perceived as "System commands".

Strange graphics buffer behavior.