Minecraft 1.12.2
Forge 14.23.5.2854
DominionLib 1.0.4
Changeling 1.2

In vanilla Minecraft, Snow Golems burn (take fire damage) in the Nether or in deserts, mesas, savannas, or other hot biomes. Snow Golems also take damage when in water. Neither of these apply for Snow Golem morphs, who can survive just fine in water or in the Nether.

To fix the water bug, it's as simple as adding water_allergy to the default list of abilities for the Snow Golem morph. However a new ability desert_allergy (or similar) would need to be created and added that makes Snow Golem morphs (and other morphs with this ability) take fire damage when in hot biomes (biome temp > 1.0).