Found out it's related to some occasional packet loss. Why this happens, I'm not sure, but appears to be more related to the wireless kernel mod than systemd in this case.
** Changed in: systemd (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1704422 Title: systemd-resolved keeps swapping DNS servers and breaking name resolution To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1704422/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs