This was the state of my raid right after Kageburado hit Domitia with Cyprian’s counterattack active:
As the screenshot shows, Kageburado did not suffer any ill effects from the counterattack. K had no talents, so that doesn’t explain it. (I can provide more specific info on time, account, and device if that would be helpful.)
I’ve also experienced the opposite effect a few times recently where my heroes play their special to no effect. Not negated by talents, just no effect other than depleting my hero’s mana. It has happened at least twice with Hansel and once with Mitsuko.