Ticket #16459: 16459.fix-link.diff

wp-includes/post.php

@@ -5176 +5176 @@
                 return str_replace( "/{$term->slug}", '/' . $slugs[ str_replace( 'post-format-', '', $term->slug ) ], $link );
         } else {
                 $link = remove_query_arg( 'post_format', $link );
-                return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
+                return add_query_arg( 'post_format', $slugs[ str_replace( 'post-format-', '', $term->slug ) ], $link );
         }
 }
 add_filter( 'term_link', '_post_format_link', 10, 3 );