HoI 4 - Combat factors "Terrain" would not be valid if the division are in multiple combats.[v1.11.5.e854]

[Chow]

Description of issue
Combat factors "Terrain" would not be valid if the division are in multiple combats.[v1.11.5.e854]

Game Version
v1.11.5.e854

Enabled DLC
Together for Victory, Death or Dishonor, Waking the Tiger, Man The Guns, La Resistance, Battle for the Bosporus

Do you have mods enabled?
No

Description
Combat factors "Terrain" would not be valid if the division are in multiple combats.

Steps to Reproduce
1. Start attached save game.
2. Watch the battle near Turku.

Upload Attachment
File(s) attached