Did you know that I ate cobblestone the other week while trying to eat the cooked beef. It was very yummy.

I've actually seen this bug quite a bit only recently, and have had some people come to me about it. It's super strange. I'll be bridging with cobblestone in my hand, and will start getting the eating animation with the cobble, but my cooked-beef count will go down.
Or while trying to eat some steak I'll literally get the food animation and start eating cobblestone (steak count goes down too) I've always assumed this was packet-loss, or the game not registering the fact that I changed what I'm holding in my hand. Super strange!