The Bug
When a baby undead/piglins, like a husk, drowned or zombie, is pressed against a solid block underwater, they still receive suffocation damage. Baby zoglin won't be affected by this bug
Steps to reproduce
Create a bubble column going upwards, using soulsand
Put a baby mob in there (
/summon minecraft:zombie ~ ~-2 ~ {IsBaby:1b}
while standing on top of a solid block with a bubble column underneath)
-> ❌ The Mob suffocates.
might be related to or the same issue as MC-150401