Minecart Breaking Bug

I was breaking a minecart which was on normal railing. I then noticed that the minecart I picked up was not named "Minecart," but it was named "entity.MinecartRideable.name" in italics, as if the player used an anvil to rename it.

Steps to Reproduce:
1. Place a minecart on normal, straight rails
2. Go into survival mode
3. Break the minecart, pick it up, and notice its name