Trace Not Ending After `session.close()` in RealtimeSession with Twilio + WebSocket

[yusuf-eren]

Describe the Bug

I'm using the OpenAI Realtime API together with Twilio and Express.js (express-ws) in a Node.js app. When the WebSocket connection is closed, I call session.close() as expected.

However, the OpenAI Agents SDK doesn't mark the trace as ended. The session is closed, but the trace remains open in the dashboard.

Here's a screenshot showing the trace still open:

---

Debug Info

• Agents SDK Version: v0.0.7
• Runtime: Node.js v22.16.0

---

Reproduction Steps

Example WebSocket route:

wsApp.ws('/media-stream/:userId', async (ws: any, req: Request) => {
    const userId = req.params.userId;
    if (!userId || !mongoose.Types.ObjectId.isValid(userId)) return ws.close();

    const user = await User.findById(userId);
    if (!user) return ws.close();

    const twilioTransportLayer = new TwilioRealtimeTransportLayer({ twilioWebSocket: ws });

    const userAgent = getUserAgent({ name: user.name, email: user.email });

    const session = new RealtimeSession(userAgent, {
        transport: twilioTransportLayer,
        context: {
            accessToken: user.accessToken,
            calendarId: user.calendarId || user.email,
            userInfo: user
        }
    });

    try {
        await session.connect({ apiKey: OPENAI_API_KEY });
        console.log('Connected to the OpenAI Realtime API');
    } catch (err) {
        console.error('Error connecting to Realtime API:', err);
        return ws.close();
    }

    ws.on('error', async (err) => {
        console.error('WebSocket error:', err);
        await session.close();
        ws.close();
    });

    ws.on('close', async () => {
        console.log('WebSocket closed');
        await session.close(); // Called, but trace still not ended
    });
});

Expected Behavior

The trace should end whenever session.close() function called

[dkundel-openai]

This appears to be a bug in our tracing backend implementation and the team is working on fixing this. Thanks for reporting it