I'm currently working on a cs map of a 10-story building. The hosties are distributed in seperate rooms on the 6th floor.
While testing, I noticed while escorting them up the 4 flights to the roof/rescue area, they eithe disappear, or just stop walking after 2 flights or so.
Going down the stairs doesn't seem to be a problem.
Do they need info nodes or something!??!