Quark has a feature called "Better Crafting Shift-Clicking" where if you shift-click an item from your inventory while using a crafting table, it moves the item to the crafting table rather than your hotbar (and villagers as well, despite it not being mentioned on Quark's website).

Item Scroller prevents this functionality from working for crafting tables, but not for villagers. This issue occurs regardless of the value of "enableScrollingStacksFallback".

I think this is probably caused by the shift + click + dragging code. It could probably be changed to not work for the first stack when shift + left clicking.