Fullscreen background not actually fullscreen

I’m struggling trying to get a fullscreen background image working. I tried both an image component as well as background property of the screen canvas.

There are two issues I have:

  1. The screensize in the preview actually changes compared to the screensize set in the editor. Even if I apply the exact height of the image to the screen height, the preview doesn’t match this.
  2. I was I could set the background image to ‘stretch’ rather than ‘show full image’ and ‘crop to fill’.

The problem is that my image has a frame around it for the edges, but it’s not working out at all.
image
image

With the screen size to exactly the height of the image:
image

At any rate, I think this would have been solved with a stretch option. Considering this is not an option, does anyone else have a solution?