Although there are many similarities between MLCers, of course they are not all the same, so what I say here may be incorrect for your situation, but for a long period of time my xh seemed unable to do things that he used to be able to do. His grasp of his second language was noticeably less good for example, and he claimed not to be able to use SMS, when he was perfectly capable of doing this previously.
My therapist suggested that he was running so many narratives in his head that there was no processing room left for additional 'non-essential' tasks.
I agree that they do not want to say 'your house' and things like that. I wonder if part of it is that they objectify us? I certainly felt that he had lost (and still does not have) any sense of me as a person. I am a symbol, a wicked witch. He ascribes awful motives to me at the drop of a hat e.g. recently when I was travelling I didn't respond to him immediately (he knew I was travelling) and I got a really abusive SMS message - (yes his ability to text has returned folks) about not being bothered to reply etc etc.
This thing with QB could be in part a loss of ability to do something he previously could do, and also a desire to keep us pulled in - we help them because we are nice, we are normal, and they need that reassurance.
At the same time as acting as if I am a horrible person, my xh also expects me to behave perfectly at all times. It is the multiple narratives, I suspect. They are running too many versions of the software!