Net64 2.5.1 incompatibility with previous servers

[Amy54Desu]

For some weird reason there is an incompatibility with some servers and this is version specific because when I use version 2.4 of net64 the server issue is gone

[Tarnadas]

What is the issue? What versions are affected?

[Amy54Desu]

Version 2.5 and 2.5.1. Certain servers like Dizzy Abyess will say "Server Refused Connection. The server might not have set up the proper port forwarding or you insertedd a wrong port" This is definitely false because when i use 2.4 (or earlier versions) I connect to it fine. The reason why this is a problem is because 2.5 has features not present in 2.4.

[Amy54Desu]

[twoBn]

https://github.com/Tarnadas/net64plus-server/releases/tag/2.2.4

2.2.4 is from November 2019, I wouldn't be surprised if it broke on 2.5.x

[Amy54Desu]

Yeah this is a problem since I had to download net64 2.4 just because of this.

[Tarnadas]

It's definitely not an incompatibility issue, since there was never a breaking change in the networking.
I have an idea why it broke, which is related to IP addresses not showing up since 2.5