Goats can't be knocked by other goats unlike other entities when summoned in front of charging goat

The Bug:

Goats can't be knocked off by other goats when charging at an entity

Steps to Reproduce:

1. Summon a bunch of goats

2. Summon an armor stand

3. Wait for any goat to charge at the armor stand

4. Summon a goat in front of the armor stand once when the other goat starts charging 

Observed Results:

Entities that are placed in front of a charging goat:

Expected Results:

Goats are supposed to be knocked by other goats when in front of a charging goat