Watchmaker wallpaper does not center on round smartwatch with android kitkat

I have a round Chinese smartwatch that runs full android and am using the wallpaper app for the watch faces but it does not center on the screen very well. its a 400x400 screen and I think its because the app is optimized for rectangular screens. If I change the screen size to 400x401 with ui tuner app it will automatically center but I had to stop using it because it causes my phone to bootloop and I have to factory reset the watch. Is there a way the app can be updated to support square screen size