The minecraft:generic.fall_damage_multiplier attribute does not function for many mobs with nonstandard fall damage behaviour

The minecraft:generic.fall_damage_multiplier attribute does not function for several mobs, most of which are affected differently by fall damage.

Affected entities

• minecraft:camel

• minecraft:donkey

• minecraft:goat

• minecraft:horse

• minecraft:llama

• minecraft:mule

• minecraft:skeleton_horse

• minecraft:trader_llama

• minecraft:zombie_horse

It is also worth noting that all entities in the fall_damage_immune entity tag are also technically subject to this issue, as having a value above 0 will not permit them to have fall damage - it may be worth removing this tag from the game and instead giving these entities a minecraft:generic.fall_damage_multiplier of 0 by default instead:

• minecraft:allay

• minecraft:bat

• minecraft:bee

• minecraft:blaze

• minecraft:cat

• minecraft:chicken

• minecraft:ghast

• minecraft:iron_golen

• minecraft:magma_cube

• minecraft:ocelot

• minecraft:parrot

• minecraft:phantom

• minecraft:shulker

• minecraft:snow_golem

• minecraft:wither

How to reproduce

1. Summon a horse

2. /attribute @e[type=minecraft:horse,limit=1,sort=nearest] minecraft:generic.fall_damage_multiplier base set 0

3. /tp @e[type=minecraft:horse,limit=1,sort=nearest] ~ ~10 ~

Observed: The horse incurred fall damage.

Expected: The horse should not suffer fall damage.