You should proof such assertions before posting them all over the forums!!! Or at least give the developer hints where you might think you did found such issues.
Players have made this glitch on my server to duplicate items.
Put an item in the backpack, put it back in its inventory. Another player, placed in front of you, will then have to open his backpack. This will create a
bug! Your backpack will close. Open your backpack and your item will duplicate (x2)
