Sometimes in The Beneath some items will disappear when dropped on the ground.

I tested this by dropping the same items on the ground over and over again and sometimes they would just be deleted. I mainly noticed this while mining since lots of ores would be destroyed. I checked the tps while mining and it seemed fine, so I don't think that's the issue either.

I am playing Magiculture 2 with a few other mods added in

Minecraft version 1.12.2
I tried versions 1.5.0 and 1.5.1 of The Beneath