The firefighter has no colleagues, and it seems as if she should have, so I am wondering if this is an AM issue.
I'm playing with no AM as my game version is 4.0.3 so I can't test as far as I can tell. I am currently playing a firefighter and there are 4 co-workers that just hang around the fire station and do nothing but they are there to befriend.
I have a few mods set up in the old framework and am using the frame limiter and kick starter from here. My game has run very smoothly with little to no trouble, no CTD and everything seems to be working fine. I have put in probably over 6 hours of play.