Particles cramped into small holes clip and spread out 10 blocks or more

Particles (mainly the mob effects particle) cramped into a small area gets spread out horizontally (see attachment), The particles should just stay in the area instead of clipping through the floor.

Steps to reproduce:
step 1. dig a hole
step 2. place command block
step 3. type in the command block ‘summon xp_bottle (the coords of where you dug the hole from)’

Then observe.