Sometimes if there are two dropped items on the ground and a fox picks one up one will go into the fox's mouth and the other will remain on the ground, but the one on the ground still displays the 3d model/icon for if there were multiple on the ground. The same thing happens if multiple items are on the ground and the player picks up all but one (due to lack of inventory space). It does not affect the actual amount of items, however (if you pick up the item that appears to be multiple after performing the glitch you will still only receive one item. Therefore, the glitch is purely visual).

Demo:
https://drive.google.com/file/d/1pz8WmTWTTGvwWOtyix06wGv5smj_rBxp/view?usp=sharing