DANE, Ubuntu 18.04 LTS, and systemd-resolved?

[Alexander Traud via Unbound-users]

In my very own app, I followed the tutorial, part 6 for LibUnbound
<https://www.unbound.net/documentation/libunbound-tutorial-6.html>. For
years, this worked fine. Since Ubuntu 17.04, all my queries return
bogus. Please, could someone comment/answer the following question:
<https://github.com/systemd/systemd/issues/4621#issuecomment-264701140>