It seems like this is https://github.com/systemd/systemd/issues/21964.
-- Tollef Fog Heen UNIX is user friendly, it's just picky about who its friends are
- Bug#1003955: systemd: systemd-networkd: wiregua... Tollef Fog Heen
- Bug#1003955: Acknowledgement (systemd: sys... Tollef Fog Heen
- Bug#1003955: Acknowledgement (systemd:... Michael Biebl
- Bug#1003955: Acknowledgement (syst... Tollef Fog Heen
- Processed: Re: Bug#1003955: Acknowledgemen... Debian Bug Tracking System
- Bug#1003955: marked as done (systemd: syst... Debian Bug Tracking System
