can't change model and reasoning efforts sometimes

[sairion]

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

26.406.31014(1395)

What subscription do you have?

Pro

What platform is your computer?

Darwin 25.3.0 arm64 arm

What issue are you seeing?

2026-04-10.5.53.54.mov

unable to set model and reasoning effort sometimes.
Not always happening, the bug is limited to be happened in a few threads, does not occur everywhere.
I think this bug is appeared from 1~2 versions before the current one.
I'm keep seeing this, it disappears after turning off and on but little bit annoying :)

What steps can reproduce the bug?

after a few hours of use, I see this bug, not sure about the repro.

What is the expected behavior?

able to set model and reasoning effort

Additional information

No response

[github-actions]

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

• Reasoning Effort picker missing 'xhigh' for gpt-5.4 and other supported models #16546
• Codex Desktop ignores config.toml default model (gpt-5.4) and sends gpt-5.3-codex via OverrideTurnContext #16984

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[sairion]

This is still occuring in newest version, 26.409.20454(1462)

[0xdevalias]

I think I am seeing this in Version 26.417.41555 (1858) as well, submitted an in-app bug report for it with ID: ef24fb68-7bb0-444c-8190-e45ec2745971

[d3ming]

Happens to me pretty consistently when I start a new conversation in a particular project, I can't change the model on the initial convo but once I start the session I can change again.

[0xdevalias]

I can't change the model on the initial convo but once I start the session I can change again.

That seems to generally be the same for me too.