I just updated minecraft after joining beta and when i logged on my character was a floating head and even the mobs. This does not affect gameplay in any big way, hit boxes are the same as well as collision. But it does make it hard to judge how close to the edge of a block you are and its hard to spot some mobs. And this bug does not only affect the mobs I also found that it can affect blocks. To my knowledge the only blockaffected us the chest,only showing the top parte leaving it almost compleatly invisible

I also play on a beat vortex 8 same version and everythind including account  and I don't have this issue/bug.