Is it just the kissing scenes that are bugged? Or other stuff in dialogue, too?

I did the quest to find Minsc in the sewers, found him and fake Jaheira talking that halfling trader (forgot the name, the one you also meet in the goblin camp and Moonrise). They talked about the gold, the trader said they'll go to the guild hall, and suddenly I was in combat with the 3. Felt a bit odd, like something was skipped.