Drinking from Chalice hits spellbane

In Akresius' shrine, drinking from the chalice triggers spellbane. Is this intended to? You drink blood from a golden chalice brimming with blood. The blood quenches your thirst. As you lift the chalice to your lips, you feel confident in your faith to receive this bloody offering. Your spellbane deflects the spell! Your spellbane devastates you! You sure are BLEEDING!