Wolves with wolf armor immues player's attack damage

Wolves with wolf armor immues player's attack damage.

In this video, I attack the 32 times and it is still alive.

Steps to reproduce:

1.Summon a wolf and tame it.

2.Equip wolf armor for it.

3.Attack it and it will completely immue your attack damage. (Its health will remain 40 unless the wolf armor breaks)