OK it is happening again.
So I have RUTX09 on LTE mobile network with CGNAT.
This is connected to a UNIFI wifi system with controller.
ALL DNS is set on the LAN side as 192.168.0.1 (RUT address) as Primary and 18.104.22.168 (or 22.214.171.124 if testing different DNS) set as secondary DNS.
On the RUT I have LAN DNS set as 126.96.36.199, 188.8.131.52 (have also tried 184.108.40.206,220.127.116.11)
When VPN IS OFF, all networking and routing works fine.
When VPN (Torguard.net) is on it will not work and the DNS does not seem to refresh on the new connection).
I am frustrated at trying to get this to work.
Is this a Wireguard issue, I note that the information sent to me by Torguard asks me to include a static DNS but this is not an option when setting up the wireguard connection.
I am not an expert in DNS but wonder if the session freezes and does not reset when the VPN is connected?
Pinging the VPN WAN address provided by torguard gets a connection.
How do I seek further support to see if this is a problem with the Wireguard add on?