SEE Not Working Correctly in Conquest with GM

Sith Eternal is not working correctly in Conquest. Every time I use him with Great Mothers and he reaches his ultimate, he disappears. His abilities are still available, but don't do anything. As you can see, Bistan and Baze have been defeated, but are still on the board. 

Please help!! This is slowing down my Conquest progression and very annoying. I have a lot of resources invested in this character and he should work in all game modes. 

I know y'all have a lot going on, but it would be great to see a fix for this issue. 

Thanks!