Everytime the map giants of karelia comes around the server seems to glitch. After the vote map concludes no matter how the vote goes the next map is always lockers. Even if it wasn't an option.
If too many peeps bail and server has less than 45 it seems to do that, i.e. ignore the map vote. Matt has explained in other threads that the threshold for DLC maps is 45 peeps in the server.