ChatGPT desktop Codex sign-in loop after successful authentication

Title: ChatGPT desktop Codex sign-in loop after successful authentication

After signing in with ChatGPT, Codex in the macOS desktop app briefly recognizes my account, then immediately returns to the sign-in screen. The bundled Codex CLI remains authenticated and successfully completes prompts.

Environment:

• macOS 26.3.1 (25D2128)
• ChatGPT desktop 26.820.60940 (build 7119), bundle com.openai.codex
• Bundled CLI 0.150.0-alpha.8
• MonoProxy: HTTP 127.0.0.1:8118, SOCKS5 127.0.0.1:8119

Reproduction:

1. Sign in using ChatGPT/device authorization.
2. CLI login status reports “Logged in using ChatGPT”; an authenticated prompt returns AUTH_OK.
3. Launch ChatGPT with proxy variables inherited.
4. Open Codex; it returns to the sign-in page.

Key log sequence:

• account lookup succeeds: authenticatedAccountPresent=true
• GET /backend-api/accounts/:param/settings uses cached token but returns 401
• error: “Missing valid access token or actor biscuit”
• auth status then changes to hasToken=false, nullReason=auth_token_missing, refreshToken=true
• account lookup fails with account_info_token_unavailable
• subsequent /wham requests return 401 without an attached token

I reinstalled the official signed app, reset its preferences/caches/containers, logged out/in again, and tested system/global proxy plus explicit proxy variables. The CLI and WebSocket connection now work, but the desktop 401/login loop remains.

Please investigate whether the desktop client or backend is losing the actor biscuit or account/workspace binding. No tokens, auth.json, device codes, or account IDs are included.

Start by reproducing the loop in the macOS desktop Codex flow and inspect the reported authentication sequence around the account settings and /wham requests. Trace where the cached token, actor biscuit, or account binding becomes unavailable; done means the desktop client remains signed in and authenticated prompts work without changing the already-working CLI behavior.