I just played the quest "The Capstone". I entered the quest with my sov and 8 henchmen. But when I got to the tactical combat map to fight against the spiders, my sov was not placed on the map. He was shown on the combat result screen though and had taken a lot of damage.

The same happend to me in the "Varda" quest. When fighting the living statues my sov was not on the tactical map and after the fight he had taken so much damage that he was defeated, despite me winning the fight.