Emacs 27.1 forces a very ugly font for Cyrillic characters and I can't override it.

[Nikolay Kudryavtsev]

Hello.

Being rather operative with the new releases, I've finally decided to 
upgrade to 27.1 from 26.2. And here's what I ran into:

In my init I have:

(add-to-list 'default-frame-alist '(font . "Liberation Mono-10"))

This forces Liberation Mono font for all frames. Or would do so before 
27.1. But now all of the Cyrillic characters get displayed in MS Gothic, 
which is a very ugly font.

I've tried to test an assumption that maybe the font-backend is 
responsible for font selection and now the harfbuzz is the default for 
me. But forcing uniscribe again didn't help.

Any advice?

--
Best Regards,
Nikolay Kudryavtsev