sheep's face and feet were gone when hit with splash potion invisibility

sheep's face and feet were gone when hit with splash potion invisibility.

*What I expected to happen was The sheep's entire body will be gone.

*What actually happened was sheep's face and feet were gone when hit with splash potion invisibility. Both potions of invisibility have ths some effect.

Steps to Reproduce:
1. I threw the splash potion of invisibility on the sheep
2. ...
3. ...