Each time I launch the game, the game window launches in a smaller window to the top left. I have the graphics settings set for 2560x1440p @ 60 FPS. I have the window type set to Windowed (Borderless). My monitor is 3840x2160p 60 FPS native, but I have my PC set to only output at 2560x1440p. All other games I play launch perfectly fine. Windowed. Fullscreen. Windowed Borderless. Etc. Only Sandstorm is giving me this issue.

I can simply fix it by entering the Video settings in-game and simply hitting 'Apply'. However, it would be nice if I didn't need to do this every single time I launch the game. I've recorded a video to show exactly what it looks like when it launches.
Youtube Video