[JAVA] [All Versions] Slime Block Duplication Glitch

Note: I have marked this as private due to the fact I want to try and limit exposure of this glitch as much as possible.

 

Please view the video here: https://www.youtube.com/watch?v=NTddS428U0A

 

I'm not sure if this is a duplicate, however I did try searching this issue, and I didn't find anything relating to it. If its a duplicate, can someone please provide a link to the correct issue?