I had a Diamond Pickaxe Effieciency III in a frame, and I was going to combine it with another pic I had, since it was close to breaking. So I broke the frame to get my pic (like you always do when you want the item from the frame) and I saw both the pic and the frame drop. I picked up the frame but when I went to get the pickaxe is was gone. So I didn't know if it was a bug or some kind of bad luck, so I posted it anyways.