Light sources make undead mobs burn in The End

What I expected to happen was...:
When I place a light source next to an undead mob in The End, nothing would happen.

What actually happened was...:
The undead mob did burn to death.

Steps to Reproduce:
1. Summon an undead mob in The End or bring one through an End Portal.
2. Place a light source next to the undead mob.
3. Burn, baby, burn!