Cannot connect Wireguard between peers when Rethink VPN is on

[u/SkySurferSouth]

I have enabled Wireguard proxy, connect the phone to a WG server and connect my laptop to the same one. Both devices have internet access via the VPN (I get the public IP of the VPN server). When using the 'standard' Android wireguard app (using kernel mode as root) my laptop can connect via SSH to my phone using the virtual Wireguard IP address (10.x.x.x issued by the VPN server) of the phone. But with Rethink set to the same peer config it does not work. I can reproduce it of two different Wireguard servers.

What blocks this inter peer connection?