Modpack version

0.4.3

Describe the bug

I was crafting with a diamond sophisticated backpack, had the majority of crafting ingredients inside the backpack and the last ingredient (lava bucket) was inside my personal inventory, I pressed tab to refill the crafting recipe and my game proceeded to freeze for about a minute, save progress and crash.

Logs

https://pastebin.com/d8HdNScx

Screenshots
none

Thanks for the report, I have relayed it here: P3pp3rF1y/SophisticatedBackpacks#92