display-featured-image-genesis/includes/css/blocks.css

div[class^="wp-block-displayfeaturedimagegenesis"]{overflow:auto}div[class^="wp-block-displayfeaturedimagegenesis"]:before{position:absolute;top:0;right:0;bottom:0;left:0;content:' ';background-color:rgba(255,255,255,0)}.displayfeaturedimagegenesis-placeholder{text-align:center;background:#eee;color:#111;padding:18px}