Editor: Do not call update for skeleton helpers. (#24532)

editor/js/Viewport.js

@@ -450,9 +450,11 @@ function Viewport( editor ) {
 
 		}
 
-		if ( editor.helpers[ object.id ] !== undefined ) {
+		const helper = editor.helpers[ object.id ];
 
-			editor.helpers[ object.id ].update();
+		if ( helper !== undefined && helper.isSkeletonHelper !== true ) {
+
+			helper.update();
 
 		}