Entity models, including mobs and players, only show heads and sometimes one of their limbs.

(Note: I'm not sure what exact device I'm using, but it's an Android Samsung Galaxy Tab of some sort.) Every model for every mob and player only shows their head. Occasionally, a leg or something will show up as well on certain mobs such as Squids and Vindicators. Players are missing their bodies, Phantoms are missing their wings, Villagers are missing their bodies and noses, etc.