Okay, the mod got a small update to address the above :man_shrugging:
It’s actually a Funcom “bug”… they move harvested loot directly to the hotbar ignoring any configuration… it’s also hardcoded and not possible to mod non-intrusively.

As a workaround I added the “hacky” solution of quickly moving any items that get looted to the twin-slots, back to the regular inventory. :man_shrugging: Seems to work fine