Overpowered duplication glitch with a sticky piston and chest.

I recently discovered a duplication glitch on Minecraft Bedrock, it’s done when you have a sticky piston with a Chest on the piston. You place items in the chest to begin, then you extend the piston. While the piston is extended you can open the chest and take the loot out before it retracts. When it retracts the items in the chest that you took out while it was extended is still there. Along with the copy you took out thus being able to easily duplicate an item. This dupe is pretty well known from what I’ve seen So far.