It may coincidence, but after I turned on control in the vassals, several strange things started to happen, and continue after several days in real time. My vassal guards turn into workers, and literally run through the gate and back to my main base. I change them back, assigning them to the vassals, but they still hang around the base. If I use the gavel, they seem to go back, but if I visit the vassal, they run back to the base again. Meanwhile, most of the workers just seem to have disappeared. It's hard to reassign them when I can't find them, so morale suffers. They show up on the HUD and table lists, but not even the gavel will bring them out. In addition, guards are auto assigned to plots other than martial, leaving martial plots vacant.