diff --git a/wp-includes/class-wp-customize-nav-menus.php b/wp-includes/class-wp-customize-nav-menus.php
index e7b7e0f505..c13ed93ba7 100644
--- a/wp-includes/class-wp-customize-nav-menus.php
+++ b/wp-includes/class-wp-customize-nav-menus.php
@@ -771,15 +771,17 @@ final class WP_Customize_Nav_Menus {
 		);
 		$args['can_partial_refresh'] = $can_partial_refresh;
 
+		$hashed_args = $args;
+
 		if ( ! $can_partial_refresh ) {
-			$args['fallback_cb'] = '';
-			$args['walker'] = '';
+			$hashed_args['fallback_cb'] = '';
+			$hashed_args['walker'] = '';
 		}
 
-		ksort( $args );
-		$args['args_hash'] = $this->hash_nav_menu_args( $args );
+		ksort( $hashed_args );
+		$hashed_args['args_hash'] = $this->hash_nav_menu_args( $hashed_args );
 
-		$this->preview_nav_menu_instance_args[ $this->preview_nav_menu_instance_number ] = $args;
+		$this->preview_nav_menu_instance_args[ $this->preview_nav_menu_instance_number ] = $hashed_args;
 		return $args;
 	}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 411d364050..34a2992e29 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-beta1-33130';
+$wp_version = '4.3-beta1-33131';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.