I am having the same problem for several weeks now, almost a month. While it searches it get stuck while waiting for host and then begins a new search after a few moments. The loop is endless and never gets past "waiting for host"
Im also having this problem. Although it would seem it's only me... None of my friends have the same problem and I also dont have problems with Zombies. I didn't change any settings, so my search preferences should still be set to "Any". Will try and do a reinstall tonight and see what happens.