False “high demand” warning with Azure GPT‑5

What version of Codex is running?

0.21.0

Which model were you using?

gpt-5 (azure endpoint)

What platform is your computer?

Linux 5.10.238-231.953.amzn2.x86_64 x86_64 x86_64 (sagemaker studio terminal)

What steps can reproduce the bug?

previously my codex 0.21.0 was working with my azure gpt-5 endpoint. Today it just doesn't reply at all, always saying

:raised_hand_with_fingers_splayed: We're currently experiencing high demand, which may cause temporary errors.

What is the expected behavior?

It should be able to reply normally

NB: upgrading to 0.22.0 fixes the issue, and it works for me again

What do you see instead?

It just replies with this
:raised_hand_with_fingers_splayed: We're currently experiencing high demand, which may cause temporary errors.

Azure metrics is showing that the requests are giving 500 status codes

But I was able to call the azure gpt-5 api with curl successfully, so there was no actual issue with the api

Additional information

Is this related to this in 0.22.0? If it's a breaking change perhaps worth mentioning in the release notes?

https://github.com/openai/codex/pull/2294 moves the login server from Python to Rust, which should help with both https://github.com/openai/codex/issues/2000 and https://github.com/openai/codex/issues/2044.