I started playing alone at first. A friend joined the game and hour later and 30 min later my game crashed. After restarting the game it started to crash everytime I enter the server browser.
I then tried joining my friend through steam (from outside of the game) which kicked me from the server. I then simply pressed "Play" which bypassed the server browser and put me into the queue. After my friend left the game I was able to get back into the server browser without crashing.
The x64 version of the game didnt crash in the same scenario but no servers showed up in the server browser regardless of filter settings.