The map looks correct. The flag that sets the vehicle winter skins is the USES_ICE flag and we have ice (GREEN). When that flag is set you also get the white background portraits (GREEN).
Both vehicles show snow skins (BLUE).
So I am not sure what to make of that.
I can approve this bug with summer skin, Kasarov also said it uses some summer assets on the map. The rest (including portraits) is fine
In other words, the game uses camos from “summer” slots on this map