Describe the bug

Traveler's backpack crashes when using multiple stack transfer feature from MouseWheelie (ctrl + LMB).

To Reproduce

Steps to reproduce the behavior:

1. Get a backpack and a few stacks of stones (can be any items, as long as they are spread across multiple slots)
2. Open the backpack and left click on the stones while holding control
3. The game will crash

Expected behavior

Items should transfer from the player's inventory to the backpack.

Logs

• latest.log: https://gist.github.com/Footage2-Amply-Pounce/293fbd3a1e655ef2c888ea4161800c38
• crash log: https://gist.github.com/Footage2-Amply-Pounce/c0344a7bee2785e2dbd7604f11fef642

Required informations (please complete the following information):

• Mod version: travelers-backpack-1.17.1-6.0.0
• Fabric: loader 0.12.3; API 0.41.3

Additional context

MouseWheelie mod: https://www.curseforge.com/minecraft/mc-mods/mouse-wheelie

Could you test it on loader version 0.13.3 and api 0.46.1? Because I can't reproduce this issue

Sorry, but I am currently not active in Minecraft modding. Since the issue is quite old and not reproducible by you, I'm ok if you close it. In case anyone encounters it in the future, it's better to open a new issue anyway, considering there's been a fair amount of updates for fabric, mods and Minecraft itself.