@straw @lina looks plausible, asbestos.cafe / 140.238.212.236 is only responding to ICMP queries from Russian IPs. At least TCP to any port seem to be dropped. Same is true for adjacent hosts in same /24 network, e.g. 140.238.212.19 and even whole ASN 31898 prefix of 140.238.208.0/20, e.g. 140.238.208.1. I also can't find any entries in https://reestr.rublacklist.net/en/ to attribute this to any of Russian ISP doing -- and ICMP do get through, so it doesn't look like routing issue either. Something in this network range seem to deliberately drop certain protocols from certain source IP ranges.

For a time being I routed asbestos.cafe via Netherlands VPN on eientei machine, media should load now, direct proactive federation in direction of eientei -> asbestos should also work now. Can't say about other way around though.