1 files changed, 5 insertions, 3 deletions
diff --git a/addons/mail/static/src/js/services/mail_document_thread_manager.js b/addons/mail/static/src/js/services/mail_document_thread_manager.js
index 6e4c8fb591c..a98ae317c9d 100644
--- a/addons/mail/static/src/js/services/mail_document_thread_manager.js
+++ b/addons/mail/static/src/js/services/mail_document_thread_manager.js
@@ -109,12 +109,14 @@ MailManager.include({
                 },
             });
             this._threads.push(thread);
-        } else if (params.name) {
+        } else {
             if ('messageIDs' in params) {
                 thread.setMessageIDs(params.messageIDs);
             }
-            // document thread may have a change of name
-            thread.setName(params.name);
+            if ('name' in params && params.name) {
+                // document thread may have a change of name
+                thread.setName(params.name);
+            }
         }
         return thread;
     },