diff --git a/diagnostic/index.html b/diagnostic/index.html
index 29a9459..8279552 100644
--- a/diagnostic/index.html
+++ b/diagnostic/index.html
@@ -597,6 +597,7 @@
         if (msg.type === 'active_session') {
           updateActiveSessionBar(msg.sessionKey);
           loadSessions(); // Tabelle neu rendern
+          send({ action: 'load_chat_history' }); // Chat-Verlauf der neuen Session laden
           return;
         }
         if (msg.type === 'session_created') {