Comment 1 for bug 2039083

I think this is related to a recent change in behavior in systemd.

It is supposed to be fixed, by implementing the "network-online.target" specification. Which defines what should be waited for: https://discourse.ubuntu.com/t/spec-definition-of-an-online-system/27838

But we first need to get some of the groundwork landed in upstream systemd-networkd.