For this bug to happen you should click a chest with right mouse button at least twice before chest inventory opens. Then the chest will quickly open and close and all your interactions with chest inventory will be undone once you close the inventory. Though on a client side you won't realise it until you open again any chest or furnace or anything like that or if you try to use a fake item from your inventory which the client thinks is there, but the server thinks is not.
For this bug to happen you should click a chest with right mouse button at least twice before chest inventory opens. Then the chest will quickly open and close and all your interactions with chest inventory will be undone once you close the inventory. Though on a client side you won't realise it until you open again any chest or furnace or anything like that or if you try to use a fake item from your inventory which the client thinks is there, but the server thinks is not.