Hello,
Recently on our modded smp, a player recently discovered a duplication glitch. The video of him doing so is attached down below. After this clip he was able to reproduce the bug again, netting him 60 netherite scraps.

Doesn't work, add my Discord: ! Allyy#6969 ( with ! and space)

I have found a consistent way to reproduce this glitch (Better Minecraft modpack v28).

As far as I can tell the state of the backpack is saved when you move it to a different slot, so after you do that, any items you take out are free. I found out the hard way that this can also be used to delete items if you put them in after moving the backpack.

?