I think it's not network-manager-openvpn bug, but openswan+network-manager bug.
Simple workaround (I didn't test it, but idea is like this) - create /etc/network/if-up.d/openswan with content from file in attachment.
I think it's not network- manager- openvpn bug, but openswan+ network- manager bug.
Simple workaround (I didn't test it, but idea is like this) - create /etc/network/ if-up.d/ openswan with content from file in attachment.