Console keyboard layout gets reset if you unplug the keyboard

On an amd64 running OpenBSD 6.4 in the console:
doas kbd us.dvorak
<unplug your USB keyboard and plug it back in>

You will find the layout is not dvorak anymore and is qwerty instead.

This also is a problem if you don't have a keyboard plugged in on boot. The
/etc/kbdtype containing "us.dvorak" gets ignored when plugging in a USB
keyboard and will default to qwerty.

--
-alfred