Block Duping for 1.1.2 to 1.1.4

How to Dupe Blocks
Bug Found by HomelikeMedal35 while building an Mob Grinder
Step 1 - Build The Dupe machine here a Link how to do that - https://www.youtube.com/watch?v=D4ILvD3jOpk&t=13s

Step 2 - Put 2 Zombie inside the Dupe Machine

Step 3 - Place the block that you wan't to dupe on The Hole of the Dupe Machine

How to fix the Bug - By Coding the Hitbox of The Zombie to be
like an Skeleton