/replaceitem does not work with wolf armor

The bug

The replaceitem command cannot be used to put wolf armor onto a wolf.

How to reproduce

1. Spawn a wolf

2. Tame it with bones

3. Run /replaceitem entity @e[type=wolf,c=1] slot.armor.body 0 wolf_armor

Expected result

The wolf should get armor

Observed result

The command claims it succeeded, but the wolf does not have armor