Default Domain bug

Ok so my project (bk-news.ru) is doing fine for a year now
I tried to make it “bk-news.ru” and redirect all the traffic from subdomain “www.bk-news.ru” to it.

The problem is: if i set my default domain as “bk-news.ru” my browser will return “ERR_TOO_MANY_REDIRECTS” and if I set it as “www.bk-news.ru” it works fine.

I tried changing canonical page settings and stuff, but now I think the problem is in DNS settings.

I have 2 A records consisting of non-recommended SSL IP addresses. as listed here Troubleshoot your DNS settings - Webflow University Documentation

Trying to use recomended ones makes my site 404.

CNAME is www → proxy-ssl.webflow.com

Halp pls
Thanks