Quote Originally Posted by Kris View Post
Disable ISAAC if it's enabled. Isaac will cause that type of issues immediately if you don't have packets 100% identified and functional.
If it's not enabled, I suggest you look over packet sizes, ensure there are no invalid sizes and everything matches. -3 is not a valid size FYI, matrix servers use it occasionally, so you'll need to modify those. Make sure you get all the packet sizes fixed; one invalid size would be enough to cause this.
Tried using ISAAC on the client, and just crashed while trying to login. So I don't think this server has ISAAC itself. Not sure If that would be the issue?