Comment # 1 on bug 885062 from Noel Power

This sounds suspiciously like a problem we have seen where winbind starts
before the network is available. Could you try the following steps to see if it
fixes your problem

a) set a time out so NetworkManager waits until network is up

edit  /etc/sysconfig/network/config

and changes NM_ONLINE_TIMEOUT to something like "30"

b) ensure winbind doesn't start 'till network is up

edit  /usr/lib/systemd/system/winbind.service
and modify the After target to include network-online.target e.g.

After=syslog.target network-online.target nmb.service
                    ^^^^^^^^^^^^^^^^^^^^^

c) make sure NetworkManager-wait-online.service is enabled

issue the following command

systemctl enable NetworkManager-wait-online.service