I have started thinking that too... I really think it has to do with her medication... I think the doctors are starting to overmedicate and it is zoning her out, which can and does happen, when a person gets so out of control and they have to figure out how much aggression people around them can take verses how much medication needs to be taken to stop the aggression. The problem, sometimes more medication is needed than the brain can handle and it causes the person to zonk out, even being coherent... Sadly, there is sometimes nothing the doctors can do because if they adjust back, the aggression picks up and if they change the medication completely, it takes a while to decrease the old, start and build up the new and then possible side effects...
We have only had 1 of our 4 that have had aggression issues. We have thankfully handled them with therapy and a very small dosage of psych medications... I am not against medications, totally the opposite but also believe in the power that therapy gives and provides... OT, Speech and general play therapy have provided not only our son but the whole family tools to help de-escalate the aggression we were seeing and experiencing...
Sadly, Abbie is given very little tools in her toolbox to help her work through aggression and the parents pick and choose medications and when to finally increase them...