Something that annoys me greatly when browsing images on Kagi is that the "next" button jumps around. I often want to look at many images so I keep clicking "next" but the button jumps around causing me to eventually accidentally close the preview.
I feel like the layout should be consistent as long as you don't change the width of your browser window. If a two-layer design is needed on smaller screens, that is fine, but the jumping around is really frustrating.