I would feel the same way in such a situation!
I hate this. I love meeting friends I haven't seen in ages. Should they bring new people without even asking/telling, I would be annoyed. I mean - if I haven't seen them for so long I really want to see them and talk to them, hear what news they have. And not trying to get to know new people. Worst case: they have some insider jokes and I am sitting there, waiting for it to be over
I am usually a good listener. I simply forget so much!
But it's hard for me to concentrate on those kind of small talk things like name, occupation, family members, etc.