We just noticed this: when I navigate to an item, the quantity on hand is way off. When I click on that smart button and it takes me to "Update Quantity", there are two entries, one for the stuff that I actually have in my stock WH and another entry for all the stuff that I've ever produced (and shipped) in the production WH.
Is this a bug? I don't remember it being there until just recently. We're on V16.0