Version : Fabric 1.20.1 (I haven't tested for future versions as of this post)
So essentially, the backslot has the capabilities to duplicate items in vanilla. But, with in conjunction with other mods, has the capacity to essentially get any item from creative.
For Vanilla, using the backslot keybind, you are able to grab items from an anvil, but still get the original item returned to you. Giving double the items you placed in.
For modded, The backslot keybind allows for placing items in slots that are intentional (Trinkets, Accessories, Create, etc). That alone causes multiple glitches due to the mods not being coded to anticipate items that weren't meant to be there.
But most importantly, from what we have tested, using create's list filters (Hypothetically anything similar to it), you can grab items selected in the list filter and move it into your inventory. Now that alone can cause a dupe, but with mods like JEI and EMI, where you can drag items into the filters even if you don't have said item, well that allows for a whole new can of worms.
So to summarize, the current design of the backslot allows for multiple duplication glitches and the capacity to give people access to discount creative mode.
Anyway, hope this finds a patch since we do really enjoy the mod, but we may have to remove it from our server due to this bug...
Version : Fabric 1.20.1 (I haven't tested for future versions as of this post)
So essentially, the backslot has the capabilities to duplicate items in vanilla. But, with in conjunction with other mods, has the capacity to essentially get any item from creative.
For Vanilla, using the backslot keybind, you are able to grab items from an anvil, but still get the original item returned to you. Giving double the items you placed in.
For modded, The backslot keybind allows for placing items in slots that are intentional (Trinkets, Accessories, Create, etc). That alone causes multiple glitches due to the mods not being coded to anticipate items that weren't meant to be there.
But most importantly, from what we have tested, using create's list filters (Hypothetically anything similar to it), you can grab items selected in the list filter and move it into your inventory. Now that alone can cause a dupe, but with mods like JEI and EMI, where you can drag items into the filters even if you don't have said item, well that allows for a whole new can of worms.
So to summarize, the current design of the backslot allows for multiple duplication glitches and the capacity to give people access to discount creative mode.
Anyway, hope this finds a patch since we do really enjoy the mod, but we may have to remove it from our server due to this bug...