I'm not sure if this is a bug or not, but I'm having issues using a ipv6 system name-server, just keep getting "unknown host" when attempting to ping for example "ipv6.google.com" from my vyos router. Appears to work fine with ipv4 and I have seen the bug relating to the dns forwarding, just not sure if this is similar to that bug and a fix for that will resolve this or if this is something separate.

Happy to raise as a bug if anyone else is having the same problem.