Servers are only displayed when alt-tabbed

[OverwatchVoice]

For some odd reason, when running SWAT 1.1, the server list is only displayed / refreshed if I'm alt tabbed out of the game. I can even connect to the games if I select the server and quickly alt tab out, but it doesn't do much good.

Strangely, I can run the EF mod's mp without any problems, but most mp servers run on 1.1.