Summoning monster with a velocity in axis Y causes it to fall through a layer of blocks

Just a client sided visual glitch - fixed when re-join

What I expected to happen was...:
Monster launched into air and fall on block it's supposed to.

What actually happened was...:
Monster launched into air with any velocity amount on axis Y gets launched into air then when landing it falls through blocks

Steps to Reproduce:
1. use command /summon Pig ~ ~ ~

{Motion:[0.0,0.5,0.0]}

change pig to any mob, change 0.5 to any number, if you want

Flying monsters are affected when flying close to ground