It may simply be, that communicating with autistic takes much more effort from neurotypical people, is more frustrating. Eventually they stop trying and putting that effort on. Just as communicating with other is tiring for autistic, except neurotypicals have plenty of neurotypicals around to communicate with.
I dont really want to guess, knowing nothing about parent. But the issues in communication with different functional autistic people I had observed that broke it down where things related to social interactions. For example, inability to imagine yourself in other peoples situation can make autistic look selfish and unfair (when enforcing rules for example). It also makes it hard to impossible to strike compromise as opponents situation is not taken into account by autistic and is perceived as "illogical".
Autistic can be overstepping boundaries without really knowing, making people uncomfortable as they have to defend those boundaries. Can be insulting or controlling without having bad intention, which forces other people to react to it in "defense" or leave for own sanity.
That is pretty much opposite of autism, where the person is using it randomly and often to personal loss.
> If you're wrong, the backlash prevents much damage and everyone learns something "new".
Backslash gets autistic bullied in retaliation. Often by people who perceive autistic to be bully and feel righteous in "self defense".
> In many cases, the boundaries are self-sabotage and immaturity, ie. org silos.
I meant personal boundaries. The set of limits healthy people impose on themselves and the world around them. They define responsibilities, what’s acceptable treatment and what isn’t. How you don't allow others to take advantage of you or manipulate you.
The boundaries are healthy and not immature at all. People who dont have them end up being treated badly and prime target for narcissists and such.