I have the Admin Backpack installed (Steam Workshop) which gives me an absurd amount of inventory space, it seems the resent update has broken this add-on because 7/10th of my backpack is unusable, i have open slots but it seems the slots are non usable, as in if i place my items in the slots that appear to be open, it will move back to the original place in my backpack and if i try to pick up anything, it says my inventory is full. anyone has any idea on this?

Stats:
OS Windows.
Other add-ons installed.