You set cover size for the breadcrumbs image and chose the almost square image. Cover means that image will cover the visible area, the width of the breadcrumbs on the desktop is much bigger than on the mobile that why you don’t see the whole image. Choose “contain” in the breadcrumbs background size to see the whole image but then you’ll get the empty space on the desktop. Unfortunately, there is no option to choose the different breadcrumbs images for the different devices.
