How to correctly set up Cyrillic in the Debian console?

Question

Debian

debian testing
Since some moment of my life, the Cyrillic alphabet disappears in the console (instead of Russian letters, small squares). "sudo dpkg-reconfigure console-setup" only helps until reboot. In the graphical environment in the terminals, everything is in order.
$ locale
LANG=en_UA.UTF-8
LANGUAGE=
LC_CTYPE="en_UA.UTF-8"
LC_NUMERIC="en_UA.UTF-8"
LC_TIME="en_UA.UTF-8"
LC_COLLATE="en_UA.UTF-8"
LC_MONETARY=" ru_UA.UTF-8"
LC_MESSAGES="ru_UA.UTF-8"
LC_PAPER="ru_UA.UTF-8"
LC_NAME="ru_UA.UTF-8"
LC_ADDRESS="ru_UA.UTF-8"
LC_TELEPHONE="ru_UA.UTF-8 "
LC_MEASUREMENT="en_UA.UTF-8"
it was noticed that in Debian stable there is no such problem, but in Debian testing this problem occurs immediately after installation, i.e. it may be a bug in some package. If so, then you need to write a bugreport somewhere.

Answer 1

It seems there was a bug in debian for a while, now it's gone. I don't know how it could be fixed. :-\

Answer 2

The squares in the console are a font issue, not a locale issue, as far as I know. Several solutions are described here .