Page Section Background for Portrait (Mobile) using smaller thumbnail version of image


I have several page sections with background images on my page. the regular background is a high resolution (QHD) image. the Portrait Image is the same image, cropped to 2:3 aspect ratio. Now when emulating a smartphone (iPhone 6, 7, 8) with Chromes Dev tools, I can see that the “data-mk-img-set” property only uses cropped thumbnails generated by WordPress and not the original image. Because the sections get very tall on mobile devices, i need the original image and not the thumbnails as these get very blurry due to the low resolution. I can also see this behaviour on a real iPhone 6.


Can you share the site URL to that I can understand the issue??