Hot Sulfur Cubes cause Armadillos to Uncurl

Hot Sulfur Cubes cause Armadillos to uncurl on contact, causing them to take full damage

Steps to Reproduce:

1. Create two 1x1 holes, each 2 blocks deep

2. Spawn a Zombie (or other undead mob) in one hole, and an Armadillo in the other

3. Spawn a Sulfur Cube in the hole with the Armadillo and give it a Magma Block

Expected Result:

The Armadillo should stay curled up, mitigating the damage from the Sulfur Cube.

Observed Result:

The Armadillo immediately uncurls upon contact with the Sulfur Cube, and quickly dies from the damage