Possible winter bug

[Umeu]

There is either a bug with how winter works in the game now or the description in the manual is wrong.

The manual says the following (which makes more sense than the current system)

CLIMATE
For the first turn of December until the last turn of March the map is covered in a winter climate. Hexes affected by winter effects are displayed as covered in snow. Unit moves and attacks on winter hexes consume more efficiency, making prolonged operations in winter terrain much harder to execute.

However, currently all units (except naval units) consume more efficiency during winter even when not moving over hexes that are covered in snow (even units moving around in the desert are affected by winter).