Posted it here because it was during my session in the official All the mods modpack, and noticed my drawers acting wonky.

Then noticed 2 random NBT out of nowhere.

So added a mod called NBT tooltips so I can see the NBT.

My held items gains 2 AS_Amulet_Holder NBT tags

Quite problematic, and sometimes shift clicking that items will keep that NBT and not mix with the ones without.

Whole story:
AllTheMods/ATM-5#216

#1334