Codex Desktop stuck after “Error submitting prompt/message”; delayed duplicate prompts became steered and Stop did not work

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.422.62136 (2176)

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Darwin 25.2.0 arm64 arm

What issue are you seeing?

I am seeing a Codex Desktop issue where prompt submission, conversation creation, queued/steered prompt handling, model display, and cancellation all behaved inconsistently.

Feedback ID:
019dd332-3bb6-7cf2-b06d-a231fded25b4

Current status:
The affected Codex session is still stuck/running. Clicking “Stop” does not appear to stop it, so usage/tokens may still be consumed. I was forced to wait since another existing conversation of mine was still running, and I would not like to interrupt it...

<img width="826" height="329" alt="Image" src="https://github.com/user-attachments/assets/43b4dc8b-a61c-4fcd-8447-57c16121d7f3" />

What steps can reproduce the bug?

During running another conversation in progress; I need to create a new conversation for a separate task:

1. I submitted a prompt, but the app got stuck and did not start any conversation.
2. The model selection area showed “Custom,” which was confusing.
3. I submitted the prompt again.
4. An empty/idle conversation was created, but it showed an error similar to “error submitting the prompt/message.”
5. In that session, the actual model shown was “5.3 Codex Medium,” not “Custom.”
6. I submitted again in the same conversation, but nothing happened at first.
7. I also tried to start another conversation, but nothing happened at first.
8. After a delay, the original session suddenly started working.
9. My repeated prompt became a “steered” message.
10. The later attempt to start another conversation also eventually created another running conversation.
11. I clicked “Stop,” but nothing happened.
12. The session is still stuck/running, and I am concerned that usage/tokens are being consumed unnecessarily.

What is the expected behavior?

• Prompt submission should either start a conversation promptly or fail clearly.
• Failed/retried prompt submissions should not later start unexpectedly as duplicate tasks.
• Queued or repeated prompts should not unexpectedly become “steered.”
• The model selector/display should consistently show the actual model being used.
• The Stop button should reliably cancel the running session and prevent further usage consumption.

Additional information

This appears to be app/session/queue/cancellation behavior rather than a normal model response issue, because the failure happened around submission, conversation creation, delayed retry behavior, and the Stop button.

• #19249: delayed/failed message submission, duplicated messages, eventual delayed execution
• #19831: stuck thinking loop, Stop not working, usage drain
• #17876: queued prompts unexpectedly becoming steered
• #12852: Codex Desktop stuck on Thinking and Stop not working