Zombie type mobs don’t take fall damage properly

When testing, I found that zombie type mobs (zombies, zombie villagers, husks, zombie pigmen, drowned) would not take fall damage properly. They would, randomly, and when dropped from 50 blocks high, either take no fall damage, some fall damage, or death fall damage. This also occurred in the zombie pigman farm on my bedrock realm.

p.s should this report have gone in the realms version report area?