[FRAC-2092] UI inventory item stacking bug when using tanning tubs
Have yet to try this elsewhere but when you take a piece of cured leather out of the tub and put it in a stack in your inventory, for a brief second the item in the tanning tub shows the number of the stack in your inventory and the inventory shows only 1 item in the stack where you are placing your item.
Effectively it looks like you're swapping the item with your stack in the tub before they merge.
Same goes for when you place items in the tub from a stack.
Fixed in v.a.2.3.0g