Ticket #42365: 42365-v2.patch

src/wp-admin/js/updates.js

@@ -942 +942 @@
                         $notice.find( 'h3' ).remove();
 
                         // Add the top-level UI, and update both.
-                        $notice = $notice.add( $( '#customize-control-theme-installed_' + args.slug ).find( '.update-message' ) );
+                        $notice = $notice.add( $( '#customize-control-installed_theme_' + args.slug ).find( '.update-message' ) );
                         $notice = $notice.addClass( 'updating-message' ).find( 'p' );
 
                 } else {