Bug Description

When exiting a normal chest the game will crash to desktop.
the second thing is say i take flint from my inventory and put it on my actionbar sometimes it will snap back into my inventory or move elsewhere and assign something random in its place.

Did this behavior use to work in the previous version?

im unsure of this as it is my first time playing the modpack

Steps to Reproduce (for bugs)

unsure havent seen an exact pattern yet it just happens randomly

Logs

Minecraft ctd.txt

Client Information

• Modpack Version:
• Java Version:
• Launcher Used:
• Memory Allocated:
• Server/LAN/Single Player:
• Optifine Installed:
• Shaders Enabled:

World Information

• Modpack Version world created in:
• Additional Content Installed:

after playing a little longer im seeing items just appear in my inventory crafting section and im wondering when i open a chest if its flinging something into the crafting screen and causing it to crash