@PinkMarshmellow
I think what you said is very good, but it could also possibly be due to motor skills issues too. If Abbie is trying to scrub dishes (for example, I thinks she did that in a vlog with Brandi) trying to get out of doing something like that would be understandable - since we all know A&P are the same parents who took her out of OT *due* to her low muscle tone..wtf! (Don't 100% quote me on this, but I'm almost certain it was in a vlog somewhere)
So that kind of task would likely be very difficult for her and she would get frustrated and perhaps overwhelmed..does that make sense?
I also just realised something..maybe Abbie signs break because she *associates* it with not having a follow up?? Eg if she's doing the dishes, goes to the toilet them comes back and does some sweeping (like I would) then it wouldn't really be thought or talked or complained about/ignored, would it? But Asshog (I love that nickname now too!) and Pissy don't follow through, so Abbie remembers this and thinks 'h, bathroom, it means I can go and then my parents will forget about what I was doing beforehand" kind of thing, you know what I mean?
Whereas listening to her each time she needs to go would not only help her understand how to use it, it would also be listening to her requests and attempts at communication, and it would also mean she - if you went back to the previous task, and helped her through said task- wouldn't use it to get out of things, so would go to the bathroom when needed but then if it's not needed she would learn that sitting there for ages for no reason isn't helpful. Hopefully that makes sense