Comment 8 for bug 2058976

I think I can reporudce this on classic...

lxc launch --vm ubuntu-daily:jammy nd-reload
lxc shell nd-reload
root@nd-reload:~# netplan get
network:
  version: 2
  ethernets:
    enp5s0:
      dhcp4: true
root@nd-reload:~# networkctl
IDX LINK TYPE OPERATIONAL SETUP
  1 lo loopback carrier unmanaged
  2 enp5s0 ether routable configured

2 links listed.
root@nd-reload:~# snap install network-manager --channel=22/stable
root@nd-reload:~# networkctl
IDX LINK TYPE OPERATIONAL SETUP
  1 lo loopback carrier unmanaged
  2 enp5s0 ether routable unmanaged

2 links listed.
root@nd-reload:~# udevadm trigger
root@nd-reload:~# networkctl
IDX LINK TYPE OPERATIONAL SETUP
  1 lo loopback carrier unmanaged
  2 enp5s0 ether routable failed
root@nd-reload:~# networkctl reload
root@nd-reload:~# networkctl reconfigure enp5s0
root@nd-reload:~# networkctl
IDX LINK TYPE OPERATIONAL SETUP
  1 lo loopback carrier unmanaged
  2 enp5s0 ether carrier unmanaged

2 links listed.
root@nd-reload:~# udevadm trigger
root@nd-reload:~# networkctl
IDX LINK TYPE OPERATIONAL SETUP
  1 lo loopback carrier unmanaged
  2 enp5s0 ether carrier failed

2 links listed.

After calling "systemctl restart systemd-networkd.service" once, the issue seems to be gone.

I do not yet fully understand what the failure condition is, though?
"networkctl" show a "failed" link. But NetworkManager is managing it fine and the network is reachable.