It's not that the game swaps characters when NPC initiates dialog. Or actually, it does. But the reason is, NPC would start dialog with the character closest to them - only a few dialogs are forced to be with the main character. So when dialog starts, the game would change selection to the character who is talking. You just need to pay attention to which character is closest to the NPC. This could be a pain sometimes, I know, but it's not really a bug.
Companions stop following you when they can't find a path around hazardous surfaces: yes they do that. It's part of their AI. They're too smart for their own good. But not a bug.
Some companions do not enter combat at the same time as others: this happens occasionally when they are out of sight of the enemies who initiate combat. Usually when they are just around a corner or something like that. Wouldn't say this is a bug either. That's just how it works.
IIRC, sometimes you can click "through" NPC and accidentally pick up something not yours - probably a hitbox issue. But I think they improved this in an old patch.
Last edited by Try2Handing; 16/11/17 05:23 PM.
