diff --git a/packages/builder/src/components/design/AppPreview/CurrentItemPreview.svelte b/packages/builder/src/components/design/AppPreview/CurrentItemPreview.svelte
index 25dd74e0d1..8e3e2dc21d 100644
--- a/packages/builder/src/components/design/AppPreview/CurrentItemPreview.svelte
+++ b/packages/builder/src/components/design/AppPreview/CurrentItemPreview.svelte
@@ -36,7 +36,6 @@
   // Messages that can be sent from the iframe preview to the builder
   // Budibase events are and initalisation events
   const MessageTypes = {
-    IFRAME_LOADED: "iframe-loaded",
     READY: "ready",
     ERROR: "error",
     BUDIBASE: "type",
@@ -157,6 +156,10 @@
 
   const handleBudibaseEvent = event => {
     const { type, data } = event.data || event.detail
+    if (!type) {
+      return
+    }
+
     if (type === "select-component" && data.id) {
       store.actions.components.select({ _id: data.id })
     } else if (type === "update-prop") {
diff --git a/packages/builder/src/components/design/AppPreview/iframeTemplate.js b/packages/builder/src/components/design/AppPreview/iframeTemplate.js
index 05192fa4d3..e8c563db9f 100644
--- a/packages/builder/src/components/design/AppPreview/iframeTemplate.js
+++ b/packages/builder/src/components/design/AppPreview/iframeTemplate.js
@@ -84,7 +84,6 @@ export default `
           if (window.loadBudibase) {
             window.loadBudibase()
             document.documentElement.classList.add("loaded")
-            window.parent.postMessage({ type: "iframe-loaded" })
           } else {
             throw "The client library couldn't be loaded"
           }