I clicked on this topic hoping, but not expecting, that is was about other people's eye contact in a group, rather than your own. This is something I notice all the time but hadn't seen anyone mention here before. I was going to write my own post about it
So yes, this happens a lot. It is really frustrating and almost hurtful when I am making the effort to ask someone a question, but they answer it to the other person! I believe it is something to do with not engaging with them enough; there is something we do that makes us appear disinterested. I am yet to figure it out.
I saw a psych who suggested I look for cues such as these and therefore incorrectly believe that people are ignoring me. If I wasn't so focussed on every little detail of a social interaction I wouldn't have a problem here. But it seems to obvious to me, and real.
I find this is one of the most painful things about having AS. Subtle social exclusion.