diff --git a/addons/web/static/src/core/macro.js b/addons/web/static/src/core/macro.js
index 8ba39f7d97b..ff27ad298cf 100644
--- a/addons/web/static/src/core/macro.js
+++ b/addons/web/static/src/core/macro.js
@@ -221,6 +221,7 @@ export class MacroEngine {
             browser.clearTimeout(this.timeout);
             this.timeout = null;
             this.observer.disconnect();
+            this.iframeObserver.disconnect();
         }
     }