Act 2 => you have a maximum of 5 BF quests there (one per trader). As the dungeons are totally random - it could be "normal" in your case to not find any solution in the dungeon you mentioned. So, I'd proceed in your case and hope, you will find the solution in BF 4-6.
I once had 3 boss enemies in 1 dungeon, the next 2 were empty. The only thing I'd do is this => search the small dungeons carefully with ALT, so you don't miss a quest item. They are not always combined with a boss enemy, but lie innocently on the ground.
