Strange problem with Korsun '44

[Kuriltai]

I emailed Rich at HPS Support and he replied as follows:
"The design team is aware, but have yet to be able to replicate the
issue - and outside of the Blitz no one has reported it...so sort of
stuck at the moment. With the miriad of hardware configurations out
there it is becoming more and more difficult to code things that will
run for everyone.

About the only thing I could suggest at this point is trying to
reduce your hardware acceleration, which often times clears up
graphical problems like this. You can do that with the
troubleshooting tab on your video card properties, normally"

Tough to fix if you cant see the problem,thats for sure.
This issue has been reported at VolcanoMods as well.