When you open the URL like this one - image_transcoder.php?o=bx_froala_image&h=6962&dpx=1&t=1634827329 - you are redirected to the actual image, but this is NOT PERMANENT URL (due to pruning and other factors), so it's better to always use URLs starting with image_transcoder.php, it checks many things, perform resizing (if needed) and then redirect to the correct image URL.