I prefer to have my drop item keybind as 'c'.
In a previous version of Ars Nouveau (1.18.2 - 2.8.0) it worked wonderfully: I could drops items as normal when not holding the spellbook and when holding the spellbook the game would instead open it instead of dropping items.
In the version of Ars I am playing with it instead completely disables my ability to drop items regardless of if I am holding a spell book or not.
I could not observe this behaviour with other keybinds (effortless building menu or minecraft sprint). I would appreciate if there is a way to fix this.