Summary

Same issue in MC-270791

Hitting an entity with a mace smash attack can knockback nearby mobs tamed by the player. 

Addons/Resource Packs: No

Attachments: Yes

Experimental Features: Yes

Steps to reproduce

1. Create a fence setup for creeper
2. Take Mace without enchantments
3. Spawn a wolf and tame the wolf then go to close range to creeper setup
4. spawn a creeper at setup and then go up your player to attack down

Observed Results

The Tamed mobs can cause of knockback after the creeper killed by mace attack

Expected Behavior

When a player with mace attacking to creeper the tamed mobs would not be knockback