Full VPN mode works, but is impractical on pay-per-traffic plan.
I am guessing the item does not enable VPN for the login-server, but only the game server?
Possibly also needs to enable VPN for the beanfun website, to check login status?
It would be much appreciated if this was fixed.
When the game’s network configuration was changed, We need to some game packet dumps to update the mudfish game item.
Please send us some game packets using Packet Capture with Mudfish link while playing the game with Full VPN mode if there’s a chance.
I’d left my answer on another topic you created on the Private Support menu. Please check it there. 
You can find your topics at https://mudfish.net/forums/iwrote link.