Playing a COOP - Campaign with my friend and we are really getting into it now, both with many hours of playtime and very well established empires.

We are encountering an issue on the 75th turn. the multiplayer will de-sync and return to main menu (no option to attempt re-sync like normal)

No matter what we do differently or loading old saves. once it reaches turn 75 it just kicks us both back to main menu.

Has anyone else experienced this? Or does anyone know of a solution?

Its an amazing mod with so much detail and welcome changes. On the other hand its very demoralising to not be able to progress past the first 1/4 of the game.

EDIT: I am playing as English Empire and my friend as the Teutonic Order (i see another user experiencing issues with the TO, so worth mentioning)