Describe the bug
When swapping an item (shift+click) from the backpack to the inventory, the game crashes. Also, the swapping from inventory to
backpack isn't smooth.

To Reproduce
Steps to reproduce the behavior:
1.install SS - forge updated for 1.20.1 ( https://modrinth.com/mod/smooth-swapping-forge-updated )
2. Open backpack
3. Swapp an item that is in the backpack with shift + left click to put it in the inventory
4. Game crashes immediatly

Expected behavior
The item should simply come smoothly in the inventory and the items in the inventory should do the same
(not the case but doesn't makes the game crash)

Versions
Latest version of Smooth swapping AND SophisticatedBackpacks, on every version of forge, 1.20.1 .

That is a known issue in smooth swapping you need to report to them