Thanks. I know what it does now. It has the same problem as a few games I have played in the past. It takes the native resolution based on windows scaling instead of just what my GPU is configurated to. As a result, having my windows scaling to 145%, it goes down to 720p resolution.
I will try your fix, it might work and will hopefully save me the pain of downscaling to 100% each time I want to play in Vulkan.