Slitherine

The game doesn't approve fullfilment one of the secondary objectives. I mean to repulse Polish counterattack near Kutno.
I remember during Beta tests it was accomplished after 4-5th turn and there were no problem.
Savegame attached.

I had to replay this scenario a couple times and definitely noticed there's some oddity around that objective. It's not really based on whether or not the Poles are actively attempting to push south--they will often keep trying even after that triggers. I have a suspicion that it gets accomplished when the tank unit that participates in the initial attack gets destroyed, which can be delayed if it retreats and repairs.