This is completally another thing, look here:

I never understood this: If the domain is a literal ip address, why the reson is “Proxy/VPN”?
I have a VPN on my android smarphone, and if I want it to work i must disable in the access control “Proxy/VPN”, but, at the same time, i have to disable “Literal IP addresses” too, but the reason of the block is only “Proxy/VPN”.
I have noticed this behavior ever since I bought your router, on many other occasions, but now I want to understand the reason for this behavior.
I don’t have the knowledge to understand this, or it can be a bug?