Windows Codex Desktop: internal apply_patch stalls indefinitely across projects while ordinary exec commands work

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

Version 26.715.31925

What subscription do you have?

Business

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

<img width="1053" height="2048" alt="Image" src="https://github.com/user-attachments/assets/b92409ca-3d55-4bf2-87c0-99255a1f7081" />

. Ordinary commands such as cmd.exe /d /c echo codex-ok work under Codex. The failure occurs across repositories and agents, particularly during substantive or UTF-8 edits. Agents then attempt PowerShell file-update fallbacks, which may also stall. Reinstalling, upgrading, and rebooting did not resolve it.

What steps can reproduce the bug?

This has occurred across multiple unrelated repositories and agents, so it does not appear to be repository-specific. It appears more frequently during substantive or UTF-8 file edits.

Control test inside Codex:

cmd.exe /d /c echo codex-ok

This completes successfully and returns codex-ok, showing that ordinary command execution works while the patch/editing path intermittently stalls.

Model observed: GPT-5.6-Sol Medium

What is the expected behavior?

This has occurred across multiple unrelated repositories and agents, so it does not appear to be repository-specific. It appears more frequently during substantive or UTF-8 file edits.

Control test inside Codex:

cmd.exe /d /c echo codex-ok

This completes successfully and returns codex-ok, showing that ordinary command execution works while the patch/editing path intermittently stalls.

Model observed: GPT-5.6-Sol Medium

Additional information

_No response_