diff --git a/addons/mail/static/src/js/services/chat_manager.js b/addons/mail/static/src/js/services/chat_manager.js
index 2655a07b55b..a58de02365a 100644
--- a/addons/mail/static/src/js/services/chat_manager.js
+++ b/addons/mail/static/src/js/services/chat_manager.js
@@ -1634,7 +1634,7 @@ var ChatManager =  AbstractService.extend({
             web_client.set_title_part("_chat", tabTitle);
         }
 
-        this._sendNotification(web_client, title, content);
+        this.call('bus_service', 'sendNotification', web_client, title, content);
     },
     /**
      * Removes channel
diff --git a/addons/mail/static/src/js/services/chat_window_manager.js b/addons/mail/static/src/js/services/chat_window_manager.js
index bab6fbf7729..bea6eaf0ace 100644
--- a/addons/mail/static/src/js/services/chat_window_manager.js
+++ b/addons/mail/static/src/js/services/chat_window_manager.js
@@ -387,8 +387,8 @@ var ChatWindowManager =  AbstractService.extend({
         this.displayState.hiddenSessions = hiddenSessions;
         this.displayState.hiddenUnreadCounter = hiddenUnreadCounter;
 
-        if (this.displayState.$hidden_windows_dropdown) {
-            this.displayState.$hidden_windows_dropdown.remove();
+        if (this.displayState.$hiddenWindowsDropdown) {
+            this.displayState.$hiddenWindowsDropdown.remove();
         }
         if (hiddenSessions.length) {
             this.displayState.$hiddenWindowsDropdown = this._renderHiddenSessionsDropdown();
@@ -487,8 +487,8 @@ var ChatWindowManager =  AbstractService.extend({
                 self.displayState.hiddenUnreadCounter += session.window.unread_msgs;
             }
         });
-        if (self.displayState.$hidden_windows_dropdown) {
-            self.displayState.$hidden_windows_dropdown.html(self.renderHiddenSessionsDropdown().html());
+        if (self.displayState.$hiddenWindowsDropdown) {
+            self.displayState.$hiddenWindowsDropdown.html(self._renderHiddenSessionsDropdown().html());
             self._repositionHiddenSessionsDropdown();
         }
     },