Coop conquest (owl-stoat) not progressing, even though we won

I started a coop conquest with a friend (I was the host, peer2peer), I played as owl, he was stoat. First mission was the new owl mission Titanomachy. Only one enemy was left, we went all in, my guardian was killed so I lost but the game continued, an AI took my clan over (it built buildings, routed troops, etc) and my friend eventually killed the last AI opponent so he (we?) won. He saw the victory screen, I saw the defeat screen. We left for the conquest menu to have a look at the next mission but I couldn't access it. For me it was like we lost the first mission, my friend however could access the next missions, for him it was like we won.
We both play on windows with DirectX.
I have the save file but here is no field to upload it...
Also the AI is still buggy, two of the opponents units got stuck and didn't move from that point on...

It's quite sad because I really like the new mission! Great idea!