I discovered an item duplication bug. I'm not sure how it happened, but I loaded my game and discovered some stuff in containers in my inventory had been duplicated. I couldn't tell if it happened during the loading process, or when switching to a new character/save file, or what. I'll keep testing and post an update if I figure out a pattern.
Viewing post in Unity Underground comments
New instance: in the northern section of level 2 where the grey goblins attack. I had recently loaded my game. I fought the goblins and picked up the gold they dropped and put that pile into one of my containers. Then I went to one of the alcoves that had one of the other goblins, picked up the red gem there, and put it into a separate container. However many coins I picked up, the gems would become that amount.
I was able to do something similar with objects from my own inventory. I dropped a pile of coins, then dropped a gem. I picked up the coins and put them into a container in my inventory, then did the same with the gems. The gems were duplicated.
So far it only seems to duplicate light items like keys, gems, potions, leeches, etc.
I'm trying to find patterns. So far it only seems to happen when dropping items into a container without opening it, and only certain items. It also doesn't affect the weight of the stack when the items are duplicated. I had a stack of over 80 fish that only weighed one stone. So far I've duplicated gems, coins, some food, keys (this was the first clue something was up), lantern oil... I couldn't get it to work on the flying potion in level 2, or some of the other potions and scrolls. I haven't tried duplicating explicitly non-stackable items like equipment yet.
Huh... It's like the cursor remembers how many objects are in the stack most recently drag and dropped until a container is opened. I started with a stack of 30 sling stones that I dropped into a container. Then I picked up 3 individual stones and dropped them, one by one, into the same sack (it doesn't seem to matter if it's the same container or different ones). When I opened the sack, there were four stacks of 30 stones.