Duplication Bug on Bedrock version

The bug consists of a sticky piston facing upwards, a chest on top of the sticky piston, and a button or other redstone input to power the piston.  By pressing activating the piston, opening the chest, and grabbing the Items right before the piston retracts.  you are able to sometimes see when the pistons retracts the chests the chest will have the items taken out still in the chest(effectively duplicating the items).  I have only tried this method on xbox one bedrock edition.  It works consistently to my experience.