Image is stretching weirdly when screen size is changed

This is how it should look like on every portrait screen size. It does on 1080 x 1920 and 1440 x 2560.

But it looks like this in 2160 x 1080 and 2960 x 1440.


Why doesn't it scale with screen height?
The picture is a direct child of a Canvas that lies directly in the hierarchy.

The ispector of the image looks like this:

 

Try making use of the "Image Type" property.