diff --git a/agents/src/voice/agent_activity.ts b/agents/src/voice/agent_activity.ts
index db16674e5..28e2418fd 100644
--- a/agents/src/voice/agent_activity.ts
+++ b/agents/src/voice/agent_activity.ts
@@ -2183,6 +2183,10 @@ export class AgentActivity implements RecognitionHooks {
     if (!ignoreTaskSwitch && newAgentTask !== null) {
       this.agentSession.updateAgent(newAgentTask);
       draining = true;
+      // Skip chat context update and reply creation - the new agent will handle this.
+      // The old realtime session is being closed by updateAgent(), so we cannot
+      // continue using this.realtimeSession after this point.
+      return;
     }
 
     if (functionToolsExecutedEvent.functionCallOutputs.length > 0) {