Soap shop: Missing items reported are actually items available

v0.9.6b

After building my soap shop, while stocking it, the bubble above the building said it was missing tallow when tallow was the item that was stocked. When the worker arrived with herbs, it briefly said that it was missing tallow and herbs before the bubble cleared.

Could it be that the missing items bubble is instead reporting the items stocked when not all items are available?