Game does not remember or respect fullscreen resolution changes

I'm running a 4k monitor, but for performance reasons I play the game at 1080p. However, the game has a number of issues related to changing resolutions.

• The game does not remember your resolution choices when exiting the game and restarting.
• The game resets the resolution when starting a new game or loading a save game.
• Going from a game back to the main menu or loading a save game also resets your resolution.
• The game sometimes resets the resolution while playing. I'm not 100% sure on the trigger here, but but it occurs after the auto-save triggers, and since I usually get a bunch of steam notifications when it happens, may be related to losing connection or reconnecting to steam.
• Changing resolution in game can in some cases cause the game to have the wrong UI scaling by default. For me, if I change the resolution at the title screen, load a game, and then change resolution again (since it resets when loading), the UI scaling is correct. If  after booting the game I load a save file and change the resolution then, the UI scaling appears to be 200% (same as my desktop ui scaling), but the slider says it's 100%. Moving the ui scaling slider a little will correct the issue.