AAAA records problem

The access to IPv6 resources suddenly stopped after the new year. This happened on many sites when using Sofia, Bulgaria gateway. It gives 502 error. If i try to access server from another country going through other gateway is all ok. The Cloudflare Bulgaria ip is not blacklisted on the servers.

domain: for example. I can open it from Germany location and cannot do this from Bulgaria.

It was fixed on its own…