Humanoid legs rotated with the body when attacking

Since 1.9, humanoid legs (such as zombie, skeleton, etc.) are rotated with the body when attacking, this is especially apparent when the entity is riding.

Steps to reproduce:

1. Summon a husk, trap it inside a boat

2. Give yourself an instant health: /effect @s instant_health infinite 255 true

3. Change your gamemode to survival

Expected result:
Legs do not rotate with the body.

Actual result:
Legs rotate with the body.