Ticket #34625: 34625.5.diff

src/wp-login.php

@@ -140 +140 @@
          * while single sites get the header title.
          */
         if ( is_multisite() ) {
-                $login_header_text = bloginfo( 'name' );
+                $login_header_text = get_bloginfo( 'name', 'display' );
         } else {
                 $login_header_text = $login_header_title;
         }