Passive Mobs (Cow, Sheep, Chicken, Mooshroom, and Pig) does not stop running when hit once.

What I expected to happen was...
After hitting one of the 4 passive mobs given, the mob will run away for 6 seconds and stops.

What actually happened was...
Instead, the mob did not stop running away...

Steps to reproduce:
1. Create a new world and select either Survival or Creative Mode.
2. Find a passive mob given above or spawn them.
3. Hit the mob.
4. After hitting it, it will run away endlessly.