That's how the bug works:
When I open the server list, a random server shows up in my LAN list.
When I refresh the LAN list, the list is just empty.
When I refresh the server list, the LAN list will still have the same server in it.
When I close the server list (window), and open it again, another random server appears in my LAN list.
Some screenshots and information about those servers:
NOTE: I was running CS2D on Linux, this doesn't occur when I'm using Win7.