COMPANIONLIST with PRExxx doesn't refresh properly if a PRExxx Target is altered

I have a COMPANIONLIST triggered by SIZE. (Cavalier Again). If I Make my race a Halfling, Cavalier 1, and then go to add a companion, the list is correct. I cancel, go and change my race to human, and then switch back to companions, and create, the list available is showing the Size Small selections still.