Disappearing Key

Sorry for making you have to find the mob, though I don't think it will be hard. Anyway, I think it's the innkeeper or the bartender, I forgot (the bug about eth dwarf with the two-handed axe prompted this, and I haven't had time to log on and check), has a key that opens the doors to the inn in the back of the inn of Old Galadon. However, when you kill him, the key disappears. I'm wondering if this was made for only warriors with offhand to be able to get, or whether it's a bug.