sticky piston item duplcation

if u have a sticky piston move a chest and grab the item in the same tick as the chest being move it duplcates the item u click (did do a quick search to see if this is allready reported coudent find it) 

coudent make the video file small a nuff to attach so made a gif out of the recording
https://gyazo.com/b8c4c5a09e2a73030ae514f461b4d8ac