Zabol : Legendary : Just Desert Bug

Hello,
We have played to Legendary "Just Desert" (in french "Légendaire: Juste le désert") in coop (main player : Roman , Second Player : Greek).

The optional goal ( send resources to the Green player) does not work properly and crash the game :
- Only the second player has this optional goal
- First player has a chrono of 15:00 minutes which does not count down at the beginning of the game, and he has not the optional goal.
- Second player's chrono count down works.
- After 15:00 of game, the game crash, even if the optional goal is achieved.

Thanks a lot!