Items can be duplicated by using sticky pistons and a chest

I was using a sticky piston in a realms server and was pushing them back and forth. what i expected to happen was that my items would stay securely in the chest and be moved from a to b.

What actually happened was i discovered a duplication exploit that if i timed it currectly i could duplicate an item. This allows people to easily complete achievements on consoles.

-Step #1 use a button to trigger a sticky piston with a chest on top (sticky piston facing upwards)
-Step #2 press the button and as the piston retrieves the chest, pull an item out of the chest. this will cause the item to duplicate.

you can find many videos on platforms such as youtube that show the exact process on how to do the exploit. this bug is ruining the legitimate feel to my realm server by people constantly cheating behind my back. Thank You!