diff --git a/modules/features/teamsbot/service.py b/modules/features/teamsbot/service.py
index 7e6eef59..bba2bab1 100644
--- a/modules/features/teamsbot/service.py
+++ b/modules/features/teamsbot/service.py
@@ -716,8 +716,10 @@ class TeamsbotService:
 
         interface = interfaceDb.getInterface(self.currentUser, self.mandateId, self.instanceId)
 
-        # Initialize SSE event queue
-        sessionEvents[sessionId] = asyncio.Queue()
+        # Reuse existing SSE event queue if a consumer (SSE generator) already
+        # holds a reference; replacing it would strand the SSE stream.
+        if sessionId not in sessionEvents:
+            sessionEvents[sessionId] = asyncio.Queue()
 
         try:
             # Update status to JOINING