So, your VPN provider is serving incorrect DNS information. That's not a bug in resolvconf.
Also, your bug report shows that you are using Ubuntu 20.04 LTS. resolvconf has been deprecated in Ubuntu 20.04 LTS in favor of systemd- resolved. ** Changed in: resolvconf (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926143 Title: DNS resolution faulty over openconnect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1926143/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs