Site2Site VPN - DHCP Relay

Hi !

I am running v6.30

I set up a site2site vpn between two sites – communication between those sites works fine.
local subnet 192.168.71.0/24
remote subnet 172.23.71.0/27
DHCP Server needs to run at the remote site – that’s why I configured a DHCP Relay on the local router.
Unfortunately the unicast is not forwarded on the VPN – it seems the request is just sent out on the ppp-interface (address-translated)
according to the Firewall Connection Tab

instead of using the local bridge interface IP the router uses the public IP of the PPP Interface (77.119.246.75) for the DHCP request.

does anyone have an idea ? appreciate any help !!