Single-file staging via “+” intermittently fails; “Stage all” usually succeeds

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

Version 260208.1016 (571)

What subscription do you have?

Business Plan

What issue are you seeing?

In Codex App, staging a single file via the “+” button in the "diff panel" sometimes does nothing for certain files, while staging works normally for other files in the same change set. Using “Stage all” stages most files in most cases, but it is also intermittently incomplete.

When it happens, the UI shows a "Partial success" toast message.

What steps can reproduce the bug?

1. Open a repo with multiple modified files
2. In the "diff panel", click “+” on the header of the file.
3. Observe that the file remains unstaged (or staging is incomplete), and a "Partial success" toast message is showing up.
4. Click “+” on other files and observe it stages correctly ("Staged successfully" toast message).
5. Click “Stage all” and observe it stages most changes, but occasionally leaves some files unstaged.

What is the expected behavior?

Clicking “+” on a file should stage that file reliably (equivalent to git add <file>), and the UI should reflect the staged state.
“Stage all” should stage all eligible changes reliably.

Additional information

_No response_