fast mode has disappeared

What version of Codex CLI is running?

0.142.2

What subscription do you have?

Enterprise subscription

Which model were you using?

gpt-5.5

What platform is your computer?

Darwin 24.2.0 arm64 arm

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

iterm2 with zsh

Codex doctor report

What issue are you seeing?

<img width="1027" height="474" alt="Image" src="https://github.com/user-attachments/assets/09db5af8-6697-41f8-9c4a-4596fb8748a9" />

<img width="1365" height="149" alt="Image" src="https://github.com/user-attachments/assets/72898eea-2f4d-461c-9583-cd700a965f50" />

What steps can reproduce the bug?

open codex-cli and check fast mode feat

What is the expected behavior?

can enable it

Additional information

_No response_