New UI2Texture procedural texture has a lot of issues with aspect ratios.
Issue #1: Engine doesn't take texture dimensions into account and always renders with 1:1 aspect ratio, even if texture is 2:1 or 1:2 or other. This means that texts will also be squished on non 1:1 aspect ratio texture.
Issue #2: Map drawn icons are drawn with fixed ratio of 4:3 regardless of display's aspect ratio, this makes them impossible to be drawn properly through UI2Texture.