NordVPN over Openvpn DNS Problem

[Patzi]

Hi i have configure NordVPN with this Doc.

https://support.nordvpn.com/Connectivity/Router/1292598142/OPNsense-19-1-setup-with-NordVPN.htm

The Problem is unboundDns is not working correct when i restart opnsense he works for <1min then she gives no response.

When i disable unbound the devices became the DNS adress , then is working !

I have not idea what i can do.

I add pictures that i hop help can help for troubleshooting!

I hope you can help me

Thanks Patrick