Ticket #35043: 35043.patch

src/wp-includes/media.php

@@ -1206 +1206 @@
  * @return string Converted content with 'srcset' and 'sizes' attributes added to images.
  */
 function wp_make_content_images_responsive( $content ) {
+        if ( is_feed() ) {
+                return $content;
+        }
+
         if ( ! preg_match_all( '/<img [^>]+>/', $content, $matches ) ) {
                 return $content;
         }