Balance of Sisters bug?

I can't artery with offhand when my main wield is disarmed The Archmage of Eternal Night dodges your electrical discharge. The Archmage of Eternal Night parries your pierce. Your electrical discharge MANGLES the Archmage of Eternal Night! Your pierce MASSACRES the Archmage of Eternal Night! You dodge the Archmage of Eternal Night's slash. The Archmage of Eternal Night utters the words, 'yjwbrz'. You fumble and drop a broad-bladed battleaxe crackling with energy! The Archmage of Eternal Night has a few scratches. <822hp 292m 720artery You must wield a dagger in your primary hand to sever an artery. The Archmage of Eternal Night has a few scratches. You fight ambidextrously with Balance of the Sisters. You parry blows with the fluid motions of the Ward of Blades.