I tried to picked up a longhorn, and it never entered my inventory properly. Then as I continued to play I wasn't able to interact with many objects as though I had an item in hand, although I had no item in hand.

Then, when opening food or eating food the longhorn would suddenly appear as though I dropped it. I would not pick it back up. Then, it would somehow be invisible equipped again and prevent me from interacting with certain items and was dropped again when I opened a can of food.