Index: src/wp-includes/ms-site.php
===================================================================
--- src/wp-includes/ms-site.php	(revision 44812)
+++ src/wp-includes/ms-site.php	(working copy)
@@ -380,6 +380,9 @@
  * @return array|false Returns false if there is nothing to update. Returns an array of metadata on success.
  */
 function update_sitemeta_cache( $site_ids ) {
+	if ( ! has_filter( 'update_blog_metadata_cache', 'wp_check_site_meta_support_prefilter' ) ) {
+		add_filter( 'update_blog_metadata_cache', 'wp_check_site_meta_support_prefilter' );
+	}
 	return update_meta_cache( 'blog', $site_ids );
 }