skeal
Part of the Furniture
My guess is that OVPN Server and or Client cannot start without a WAN connection and or NTP update.Works for me. I just setup a router with a PIA OpenVPN client set to connect at boot, and DNS over TLS enabled. On a reboot everything was started normally.
VPN clients don't get started until after the WAN comes up.
Check what customization you have in place. Also check your boot log for any error message during boot.