1 files changed, 3 insertions, 0 deletions
diff --git a/addons/mail/static/src/components/chat_window/chat_window.js b/addons/mail/static/src/components/chat_window/chat_window.js
index 4480be9db11..46e60bbea54 100644
--- a/addons/mail/static/src/components/chat_window/chat_window.js
+++ b/addons/mail/static/src/components/chat_window/chat_window.js
@@ -135,6 +135,9 @@ class ChatWindow extends Component {
         if (!this._threadRef.comp || !this.chatWindow.threadViewer) {
             return;
         }
+        this.chatWindow.threadViewer.saveThreadCacheScrollHeightAsInitial(
+            this._threadRef.comp.getScrollHeight()
+        );
         this.chatWindow.threadViewer.saveThreadCacheScrollPositionsAsInitial(
             this._threadRef.comp.getScrollTop()
         );