Hey. I was on a zombie-vessel-mission and fund a "bug":
When every enemy is dead and the last one, a Zombie Sentinel, is mind controlled, the mission ends and the game crashes. I think, because there is no option to keep an alive specimen of this, maybe?
Well, here is the savegame, if it can help anyone (X-Vampiress right on the exit of the metallo, ready to mind control):