It is strange, when I was using 9081 there was no bug with loading maps via the console, it first appeared in 9189.
It is not graphical problems, as i can get all the maps when they appear as missions.
Might it be something with pausing the game that causes the error? You see, when I type in the console for example: "map mine01d" (Its not only "Snow") I get the loading screen. When the loading is finished the map starts, jet it is blank (see screenshot) and it turns pause on automatically. Thats why I tried going to a mission, which appears properly, pause the game and when i click/doubleclick to move, the same thing happens. Even though the map is already loaded.
Re-downloading, re-installing and adding the newest files does not help.