`gpt-5.3-codex xhigh` → auto switches to `gpt-5.3-codex medium` mid way

What version of Codex CLI is running?

v0.102.0-alpha.8

What subscription do you have?

Pro

Which model were you using?

gpt-5.3-codex xhigh

What platform is your computer?

macOS

What terminal emulator and version are you using (if applicable)?

iTerm2

What issue are you seeing?

>_ OpenAI Codex (v0.102.0-alpha.8)                │
│                                                   │
│ model:     gpt-5.3-codex xhigh   /model to change

I start above a session with the above, I begin to /plan and after a couple of messages my status-line shows me

gpt-5.3-codex medium · ...

What steps can reproduce the bug?

Not sure what's triggering this, happened twice in a row.

What is the expected behavior?

Stay on the model I'm on!

Additional information

_No response_