Steps to reproduce error: 

1. Pen up 3-10 foxes in separate neighboring enclosures within a larger enclosure. 
2. Drop some food items (quantity equivalent to the number of foxes you have prepared) of the same kind on the same block. 
3. Leash one fox, release it, have it pick up a piece of food, and lead it back into its previous enclosure. 
4. Repeat Step 3 with each fox until there is one fox left and thus one piece of food remaining. Observe the pile of items with each turn. 
5. Repeat Step 3 with the last fox, watching as what seems like a pile of multiple items suddenly vanishes into the fox’s mouth. 

I’ve been testing this a lot since I first noticed that something looked off after I threw food to foxes, and for some reason multiple items on the ground show when foxes have eaten to the point that there’s only one item left (I make sure there are the same number of items as foxes and keep one fox away while the rest pick up the items); then the last fox picks up the item and POOF suddenly it looks like 2-5 items disappear and all of it is gone.