Comment by xena

Anubis does this. Happy Eyeballs (https://en.wikipedia.org/wiki/Happy_Eyeballs), IPv6 privacy extensions (https://oneuptime.com/blog/post/2026-01-15-ipv6-privacy-exte...), and devices migrating between home and mobile IP addresses as the person moves have all caused issues with this. Fixing this is hard, but I have been trying.