Hi @billy.rooney,
Thanks for reaching out.
It’s aspect ratio related, and similar to the video, when it doesn’t match the aspect-ratio of the video player, it will then displays black background to the empty area. But with background images, it crops the side instead of displaying empty spaces to fit the image in the layout dimension. So imagine if the sides have empty space, it will then stretch the height so the width increase until it fits the width of the container, but by also increasing the height, it overshoots to the top and bottom clipping it.
Now to explain it further, your section has narrow height but wider width. Hence, top and bottom will be clipped since it fits the width. The solution is uploading a narrow height with wider width image to match the aspect ratio. OR, use percentage padding in your section (top and bottom) so it would respond according to the content. There is no complete solution when it comes to the background since container changes as the content change.
Thanks!