diff --git a/snippets/shx-3d-render-input.liquid b/snippets/shx-3d-render-input.liquid
index ecf8ce6..cb50f79 100644
--- a/snippets/shx-3d-render-input.liquid
+++ b/snippets/shx-3d-render-input.liquid
@@ -179,6 +179,7 @@
             const Viewer3DContainer = this.Viewer3DContainer;
 
             function iFrameListener() {
+                console.log("iFrameListener");
                 window.addEventListener('message', function(event) {
                     console.log("event.origin",event.origin)
                     if(event.origin !== "https://3d-viewer.shinnex.de") return;