If a player is in (Tall Grass) Mobs can see them but not attack This is not really a bug but a problem In other words the player can hide in grass and not die! This is not good and not fun only creepers can kill the player..

Put the summary of the bug you're having here
It hides you from mobs when it should not!

What I expected to happen was...:
Describe what you thought should happen here
The mobs should be able to kill you/kit/shoot you

What actually happened was...:
Describe what happened here
The mobs could not attack me!

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
First: Walk into tall grass and you wont be killed by mobs (Crepers do Explode)