I'm not sure. But I think so.
I will try saving a game with current resolution and then load it.
Update:
It crashed again. And this time I'm sure that the savegame was in the same resolution as the resolution I've been using while trying to load it.
I can load from the main menu but I can't load during a mission.
Update 2:
I can only load a game from the main menu when starting the game. If I abort a mission and try to load a savegame from the main menu it crashes. So basically, I can't load a game for the second time.