It is probably the same thing that causes crashes with BF2 as they use the same engine. In short, no idea and hopefully EA does something to fix this problem.
As for Titan maps, we are constantly discussing possible changes to the server and are open to the possiblity of Titan maps in the future, but the community has indicated that they have a preference for conquest so it that changes so will the server content. We aim to please.
The voting seems to be evening up though so maybe sooner than later.
Titan or Conquest?