On a fresh MicroOS installation, sshd fails to start when attempting to bind to
a specific IPv6 address, which is assigned to Networkmanager.

The /etc/ssh/sshd_config.d/local.conf file looks like the following

> AddressFamily inet6
> ListenAddress <redacted>

This is a dedicated management address, that has been assigned to
NetworkManager via

> nmcli con mod enp1s0 +ipv6.addresses "<redacted>"

Of course, restarting sshd after booting resolves the issue, the problem is
that it appears, that there is a race condition between sshd and NetworkManager
that doesn't allow sshd to listen to a static address, which has been assigned
to NetworkManager.