When opening the Chest Cavity, your inventory slots are a few pixels offset from where they should be.
The Chest Cavity inventory itself is properly-aligned, but the lower, player inventory is not.

This isn't a major issue, but it's something I've noticed for a few versions now, and is hard to ignore once you see it.

Chest Cavity:

Regular Inventory:

Should be fixed in latest version

heh the 1.17 version of cc fixes this but now the chest cavity is offset

oh, weird