"If you use the Skull of Corruption on Arkved, he will awaken and his corrupted clone will attack him; they will fight until the clone disappears, and Arkved will return to being unconscious." Classic Oblivion
"In Oblivion Remastered, Arkved will stay unconscious while his clone attacks him. This will continue until either Arkved's clone disappears, or he dies."
From UESP. Maybe should work like in the Remaster