SSH tunnel and gluetun firewall

[enchained]

I use SSH tunnel to access my container web ui remotely: ssh -R WEB_PORT:localhost:WEB_PORT user@PUBLIC_IP

But when I put my container under the gluetun network, this command stops working, while I can still access the container under LAN_IP:WEB_PORT

Does it happen due to the firewall? What should I enable for the tunnel to work?