To reproduce the issue just install the two mods and try to right click an item into the top left slot (where you put what you want to multiply) - it will create a ghost item.

Reported over Technic's Discord & sinkillerj/ProjectE#1852.
Currently not using the forked version, although I tested with it and the issue still occurs unfortunately

This was fixed by 1b015a1 & 3382eb1, closing