OpenVPN failed to create tunnel after failover after upgrade to 25.1.7

[ajr]

I upgraded may backup node and then did a failover to (persistent CARP switch) to upgrade the old master.
The OpenVPN client could not create a tunnel.
I switched back to the master with old master and the tunnel came up.

Does the OpenVPN configuration needs a change with 25.1.7, related to:
openvpn: add port-share as advanced feature
openvpn: add (push) block-ipv6 option

[Fabian Wenk]

I have just upgraded an HA setup from 25.1.5 to 25.1.7 with running multiple OpenVPN servers running. Still in legacy mode one for end users clients, two for Site2Site to some Ubuntu servers running OpenVPN and one where another OPNsense does connect from with the legacy client. Plus also a new instance for end users.
So far all of them are working fine, as they already did when the secondary system had been updated and then was CARP master.

Maybe check in VPN / OpenVPN / Log File for anything indicating what may be the issue.