Updating Codex to the latest version resulted in tasks disappearing and the model list changing

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

Microsoft Store package: OpenAI.Codex / ChatGPT 26.707.30751

What subscription do you have?

Subscription: ChatGPT Pro

What platform is your computer?

OS: Windows 11 Home, 64-bit, version 26200.8737 (build 26200)

What issue are you seeing?

After updating Codex to the latest version, a bug occurred. Modifying the configuration file revealed that Codex would change differently depending on the configuration file, as described below

What steps can reproduce the bug?

When the model_reasoning_effort attribute in the config.toml configuration file is not empty, CodeX:

ChatGPT/CodeX toggle options: Show
Projects task list: Show
Model list: Do not show GPT 5.6

<img width="661" height="104" alt="Image" src="https://github.com/user-attachments/assets/f113ad37-cc3b-49bb-8a48-e3789f452bea" />

<img width="1439" height="996" alt="Image" src="https://github.com/user-attachments/assets/8640f7a1-4939-4374-a58b-e5a0ede7943b" />

When the model_reasoning_effort attribute in the config.toml configuration file is empty, CodeX:

ChatGPT/CodeX toggle options: Do not display
Project task list: Do not display
Model list: Display GPT 5.6

<img width="569" height="95" alt="Image" src="https://github.com/user-attachments/assets/5c030e5b-697a-48a8-b417-a9f0eaa2b7d9" />

<img width="1416" height="1000" alt="Image" src="https://github.com/user-attachments/assets/50affd4e-91fe-47c4-83e7-a7bfec477c78" />

Everything was normal before the update

Even with repeated validation, this remains the case
I didn't try uninstalling and reinstalling because I was afraid of losing my local project data

What is the expected behavior?

_No response_

Additional information

_No response_