Tamed wolves are not immune to arrows from the owner

I was killing a skeleton with my bow named “The Ender Slayer” when I accidentally killed my dog. This is a bug since dogs are immune to attacks from the owner.

What I expected to happen was...:
When I accidentally shot the dog, it should’ve survived.

What actually happened was...:
Instead, it died.

Steps to Reproduce:

1. Tame a wolf.
2. Shoot it with a bow.
3. It will die.