Remote pairing fails on multiple phones while Windows host is connected

Description

ChatGPT Remote pairing consistently fails after scanning the QR code.

The Windows host successfully enrolls and connects to the OpenAI remote-control WebSocket, but the mobile app displays “Pairing failed.” The same failure occurs on two different phones.

Environment

Host OS: Windows

ChatGPT desktop app version: 26.903.71938

ChatGPT plan: Plus

Mobile devices tested: Two different phones

Same ChatGPT account and workspace used on desktop and mobile

Steps to reproduce

Open the ChatGPT desktop app.

Go to Settings → Connections → Control this PC.

Enable Remote Control and select Add.

Scan the newly generated QR code using the ChatGPT mobile app.

Complete the authentication process.

Actual result

The mobile app displays a pairing failure message and asks to scan the code again. No phone is added to the connected-device list.

Expected result

The phone should pair successfully and the Windows host should appear in the Remote section of the mobile app.

Troubleshooting already attempted

Updated the desktop and mobile apps

Restarted the desktop app and Windows

Reinstalled the mobile app

Tested both Wi-Fi and mobile data

Generated and scanned fresh QR codes

Verified the same ChatGPT account, workspace, and Plus subscription

Completed MFA/passkey configuration

Reset the locally persisted remote enrollment

Tested with two different phones

The host log showed the remote-control WebSocket reaching Connected on 2026-09-15 at 00:41:17 KST, but mobile pairing still failed.

Related shared session ID: 01a05fda-0b40-7f61-ac68-d36bbed860a2

No source files, tests, or entry points are named. Reproduce the QR pairing flow from Settings → Connections → Control this PC on Windows, then compare the host WebSocket connection with the mobile pairing result and use the shared session ID in the logs; done means a phone appears in the connected-device list.