Duplication

i RECENTLY FOUND THIS HOPPER CHEST GLITCH!!!!
I have a RCA Voyager 7 Android 6.0.1

[STEPS]
1.Get 1 chest
2.Place down chest
3.Get hopper
4.Connect hopper to top of chest
5.Get anny item
6.Click or touch on hopper and spam the item back and forth
7.You should get the item in the chest and your inventory.
8.You have Duped that item succesfully
9.This works in other peopls worlds
10.PLZ TAKE THIS OUT OF GAME ITS ANOYING THAT PEOPLE JOIN MY WORLD AND DUPLICATE ALL MY IRON GEAR AND MY DIAMONDS
#MeLEGIT
#FTW
#MVP
#FIX
#PLS