Describe the bug
A clear and concise description of what the bug is.
Crash log if it's a crash: https://pastebin.com/5eBCPPAV
Info on what other mods you're using that may cause a conflict here if applicable.

Mouse Tweaks shift click dragging items feature crashes the game in a backpack. Ive had this consistently happen since I installed your mod, ive had to avoid but it happens too often this way without exception.

Please go to Discussions to add new feature requests / suggestions or comment on existing ones.

To Reproduce
Steps to reproduce the behavior:

1. Open backpack
   2.Shift click drag any item.
2. Crash to launcher

Expected behavior
A clear and concise description of what you expected to happen.
no crash

Screenshots
If applicable, add screenshots to help explain your problem.
crash report is enough.
Versions
Mod version that you're using. Version of forge may also be helpful in some cases
1.19.2 forge 43.2.0
latest.log

I've got the same issue, although its only when trying to drag in the lower half. I have a gold backpack and I can shift drag the top layers just fine.

actually scratch that, even without the mod it crashes, shift clicking smelted furnace upgrade items crashes as well

smoothswapping is your issue so you will need them to fix their code