Issues with game resolution

Hey guys. I’m having trouble resolving an isssue and I can’t find answers anywhere on google or any forum. A few days ago I tried to launch grim dawn, tabbed out while it was booting and then started the item assistant mod at the same time and the resolution got bugged. Game is running at 1920x1080, same as my native resolution. But when I try to run the game in windows borderless, use GrimInternals, alt tab or exit the game, it leaves my screen on a lower resolution.

A bit of an odd problem and I don’t know how to fix this anymore. Have done repair.exe, verified game files, manually set resolution in mydocuments/settings/options file, fresh install via steam etc.
Does anyone know how to fix this? Thank you

1st photo - normal settings everythings fine
2nd photo - shows what happens when I try to use griminternals - the resolution is off (it is stretched to fill on my screen while taking screenshot)
3rd photo - I change to windows borderless mode - it becomes stretched
4th photo - what I see when I exit grim dawn via exit to desktop - it is a lower resolution and I click anywhere on the screen then it reverts to 1920x1080


Any help would be greatly appreciated. I really enjoy this game!
Thanks in advance.