This was my guess. Despite supposed to be a university, the character models for the students do not really seem to represent the age. And combined with the scale of them compared to the map, it is possible steam considered them children. This was something I feared would be the roadblock, but who knows steam's reason.
96 days ago (+1)
If you compare a Student Predator with a prey, the prey appears to be slightly shorter than the Student Predator, or just around the Student Predator’s chest. Good example to test it is Bella or Satie. (Honestly, this is harder to compare the heights from side by side.)
