In-Game Web Browser does not allow navigation of same websites

I own a server on Empires and I'm having problems with plugins' interaction with the in-game web browser.
When using the in-game web browser I can't navigate the same website, but I can go to other websites.
For example, I have a profile plugin, however since my MOTD is a steamgroup page, the profile plugin will not work properly.
To be perfectly clear, it's not just plugins that don't work properly, when clicking links on a website that would link to the same website, it doesn't work either.
I'm not sure how long it's been happening, I don't know if it's related to sourcemod or just a general bug in the game.
Has anyone heard of a similar bug?