Describe the bug
Game crashes when attempting to hotkey an item out of the backpack to the hotbar using 1-9 keys.

Crash report:
https://mclo.gs/ZGDv3ql

To Reproduce
Steps to reproduce the behavior:

1. Open backpack
2. Press 1-9 to move an item directly to the hotbar
3. Game crashes with index out of bounds of array

Expected behavior
Should behave like vanilla

Versions
Sophisticated Backpacks: 1.19.2-3.18.55.889
Sophisticated Core: 1.19.2-0.5.83.394

smoothswapping is crashing you, please report to them or don't use that mod if you want to use backpacks.