Dank Null version 1.4.43
Forge version: 14.23.5.2836
(I am playing on Enigmatica 2: Expert 1.64d)

If you pick up a shulker box, put it in the dank null and enable OreDict every normal chest you pick after will be transformed in a shulkerbox.

If the shulkerbox you first put in has originally any items in it, every chest that is transformed in the shulkerbox will inherit all the original items, thus allowing for easy mass duplication.

#170 has a similar problem, and any NBT item will have a similar problem and should be auto black listed?