diff --git a/addons/mail/static/src/core/common/chat_window_container.js b/addons/mail/static/src/core/common/chat_window_container.js
index 1bb3a354c00..6171dcfa2f4 100644
--- a/addons/mail/static/src/core/common/chat_window_container.js
+++ b/addons/mail/static/src/core/common/chat_window_container.js
@@ -7,15 +7,7 @@ import {
     CHAT_WINDOW_WIDTH,
 } from "@mail/core/common/chat_window_service";
 
-import {
-    Component,
-    onWillStart,
-    useExternalListener,
-    useState,
-    onMounted,
-    useRef,
-    useEffect,
-} from "@odoo/owl";
+import { Component, useExternalListener, useState, onMounted, useRef, useEffect } from "@odoo/owl";
 
 import { browser } from "@web/core/browser/browser";
 import { Dropdown } from "@web/core/dropdown/dropdown";
@@ -48,9 +40,8 @@ export class ChatWindowContainer extends Component {
         this.hiddenMenuRef = useRef("hiddenMenu");
         useEffect(
             () => this.setHiddenMenuOffset(),
-            () => [this.chatWindowService.hidden]
+            () => [this.chatWindowService.hidden, this.store.isMessagingReady]
         );
-        onWillStart(() => this.messaging.isReady);
         onMounted(() => this.setHiddenMenuOffset());
 
         this.onResize();
diff --git a/addons/mail/static/src/core/common/chat_window_container.xml b/addons/mail/static/src/core/common/chat_window_container.xml
index ca4fe096b88..23504c63224 100644
--- a/addons/mail/static/src/core/common/chat_window_container.xml
+++ b/addons/mail/static/src/core/common/chat_window_container.xml
@@ -2,7 +2,7 @@
 <templates xml:space="preserve">
 
 <t t-name="mail.ChatWindowContainer">
-    <div class="o-mail-ChatWindowContainer" t-if="!store.discuss.isActive or ui.isSmall">
+    <div class="o-mail-ChatWindowContainer" t-if="store.isMessagingReady and (!store.discuss.isActive or ui.isSmall)">
         <div t-if="chatWindowService.hidden.length > 0 and !ui.isSmall" t-ref="hiddenMenu" class="o-mail-ChatWindow-hiddenMenuContainer position-fixed bottom-0">
             <t t-call="mail.ChatWindowHiddenMenu"/>
         </div>