linkNot sure if this is a bug, but it feels wrong.
The exploding mushrooms in the underdark do not react to familiars.
The quest to save the dwarf is super easy that way. The imp throws the torch, the bag and the rare mushroom to a save place, my chars pick it up and then I can throw the scroll to the dwarf.
The exploding mushrooms should react to proximity of any creature, I guess.