Cannot damage magma slime with splash water bottle.

When throwing a water bottle on a magma slime, the expected result is it should end up taking damage, many mobs like the enderman for example take damage from a water bottle.

How to reproduce

Obtain a water bottle and a magma slime egg

Then spawn the magma slime and throw a water bottle at the mob, its not gonna take any damage.

Observation: The magma slime doesn't take any damage when throwing a water bottle.
Expectation: It should take damage just like any other mob.