0.0.9d
Sometimes, when a customer comes in to buy something, it plays the sound that they make when they request something, but as soon as they arrive, they just disappear with the dismiss button hanging in the air to the left, unable to be clicked.
Might be related to what I've got in my shop, so, if it is, I've got three copper bars and one tin bar, along with one of each common grip and guard.