Access to Pihole Through VPN

When I’m outside of my network, If I use OpenVPN to access my Pihole, the webpage is blocked by Firewalla and logged as blocked through the network flows.  If I use Wireguard the block doesn’t happen and I have full access.  If I access the details in the network flow and use the “Why is it blocked”. It comes back with no rule is blocking my Pihole IP address.

Pihole is built in docker on the Gold.

I don’t use family, Adblock etc.

Any ideas other than just use wireguard….😄

Thanks

Andy