diff --git a/addons/web/static/src/legacy/js/owl_compatibility.js b/addons/web/static/src/legacy/js/owl_compatibility.js
index 2dbc895aa32..cd9eb32836e 100644
--- a/addons/web/static/src/legacy/js/owl_compatibility.js
+++ b/addons/web/static/src/legacy/js/owl_compatibility.js
@@ -626,6 +626,9 @@ odoo.define('web.OwlCompatibility', function (require) {
         }
 
         render() {
+            if (this.status !== "mounted") {
+                return;
+            }
             if (this.renderProm) {
                 this.node.render(true);
                 return this.renderProm;
diff --git a/addons/web/static/tests/legacy/owl_compatibility_tests.js b/addons/web/static/tests/legacy/owl_compatibility_tests.js
index 89df699aea6..8296fd01041 100644
--- a/addons/web/static/tests/legacy/owl_compatibility_tests.js
+++ b/addons/web/static/tests/legacy/owl_compatibility_tests.js
@@ -1060,7 +1060,7 @@ odoo.define('web.OwlCompatibilityTests', function (require) {
         });
 
         QUnit.test("lifecycle mount in fragment", async function (assert) {
-            assert.expect(17);
+            assert.expect(18);
 
             class MyChildComponent extends LegacyComponent {
                 setup() {
@@ -1077,8 +1077,8 @@ odoo.define('web.OwlCompatibilityTests', function (require) {
             MyComponent.components = { MyChildComponent };
             const MyWidget = WidgetAdapter.extend({
                 start() {
-                    let component = new ComponentWrapper(this, MyComponent, {});
-                    return component.mount(this.el);
+                    this.component = new ComponentWrapper(this, MyComponent, {});
+                    return this.component.mount(this.el);
                 }
             });
 
@@ -1097,6 +1097,9 @@ odoo.define('web.OwlCompatibilityTests', function (require) {
                 "onRendered MyChildComponent",
             ]);
 
+            await widget.component.update({});
+            assert.verifySteps([]); // Out of DOM: shouldn't do anything.
+
             widget.$el.appendTo(target);
             widget.on_attach_callback();
             assert.verifySteps([