Codex VS Code WSL app-server stuck at 70–90% CPU with outbound queue is full

[mkikunda]

Hello,

I am using Codex VS Code extension with ChatGPT Pro on Windows + WSL Ubuntu.

Codex is installed only in WSL: Ubuntu, not locally anymore.

Extension version:
openai.chatgpt 26.422.71525

Problem:
As soon as I open the Codex panel, the local Codex app-server starts consuming 70–90% CPU and the panel becomes unusable.

Process shown in WSL:
~/.vscode-server/extensions/openai.chatgpt-26.422.71525-linux-x64/bin/linux-x86_64/codex app-server --analytics-default-enabled

Logs:
codex_app_server::transport: dropping overload response for connection ConnectionId(0):
outbound queue is full

Sometimes the process remains as:
[codex]

I already tried:

• uninstalling and reinstalling the extension
• removing the local installation and keeping only WSL
• killing codex app-server
• wsl --shutdown
• restarting VS Code
• reconnecting/reloading the window

The issue persists after reinstall.

Please advise or provide a workaround/rollback version.

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• [Persistent multi-version bug for VS Code SSH Linux] enters overload loop and collapse after threads stuck and recovery #20029
• VS Code Remote-SSH session resume hangs with app-server outbound queue full #19608
• [WSL/Linux] Long Codex threads intermittently open as blank panel, short threads load normally #19434
• Codex/ChatGPT VS Code extension triggers fan ramp-up and software GPU/WebGL fallback on Linux with GPT-5.5 #20212
• High CPU usage in VS Code when opening Codex panel in a non-Git workspace #20295

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[mkikunda]

Additional confirmation:

This issue also happens after keeping Codex installed only under WSL: Ubuntu and removing the local Windows installation.

The process immediately restarts when the Codex panel is opened and consumes high CPU again.

Latest observed process:
~/.vscode-server/extensions/openai.chatgpt-26.422.71525-linux-x64/bin/linux-x86_64/codex app-server --analytics-default-enabled

Observed CPU:
70–90%

Observed log:
codex_app_server::transport: dropping overload response for connection ConnectionId(0):
outbound queue is full

After killing the process, it sometimes remains as:
[codex]

This looks closely related to the duplicate issues detected by GitHub Actions, especially #20029 and #19608, but I am keeping this issue open because this is happening specifically with WSL Ubuntu on Windows and the latest extension version.

[sabeti]

I'm having the exact same issue, however, my panel isn't locked out, though the CPU usage is high for the same process mentioned above.

Extension version: 26.429.30905