Last time I got stuck in the Rescue mission because I killed all attacking monsters but apparently I was not close to the rescued soldiers. It was a last group, 2 previous groups were already following me. After killing those mobs the first part of the mission was ticked as done but the last rescued group did not want to follow me. I tried to teleport using the teleporter in the mission, I tried to die (killed myself using warp)...nothing helped.
This stupid bug ruined the whole Void crusade for me :-(