Weird graphical issues with lighting after upscaling

I'm sorry for not providing further details. Let me provide some screenshots to better explain my issue.

Here is a screenshot of the main menu of Singularity being rendered at the default resolution:

   

And here is the main menu being upscaled to 1440p:

   

Notice how the swirling light in the background suddenly changes in shape and appears to have blocky artifacts? This similarly happens to all lighting effects within the game when upscaled at all. I was wondering if there is a way to fix this or if it's just a product of upscaling past the default resolution.