Weird sound issue

[fdgbowser]

The sounds work fine after a server restart, and apparently after a manual map change, but sometimes after someone wins a game and the map switches, the sounds will cease to work for the duration of the map (all the default sounds and the winner songs).

I get the same error in console as if sv_pure or zblock were enabled (zblock is on the server, but is currently disabled. I would remove it, but when I try to delete one of the files it says I dont have permission or something like that).

Anyone know what could be causing this? Is it zblock, even though it is disabled?

Server IP: 63.251.20.35:27015