[Windows][26.810.50856] Intermittent severe system-wide stutter; restarting Codex restores responsiveness

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

26.810.50856

What platform is your computer?

Windows x64

What issue are you seeing?

The Codex / ChatGPT desktop app occasionally causes severe system-wide stuttering on Windows.

When the issue occurs, the slowdown is not limited to the Codex window: general Windows interaction becomes noticeably laggy and the machine feels severely unresponsive.

Fully closing the Codex desktop app and launching it again immediately restores normal system responsiveness.

The exact trigger is currently unknown. I have not yet identified a deterministic sequence of actions that reproduces it, so I do not want to speculate about the root cause.

This may be related to the system-wide stutter / high-CPU regressions reported for the earlier 26.810.4967.0 build, such as #38547 and #38554, but this report is specifically for build 26.810.50856 and I cannot confirm that the underlying cause is the same.

What steps can reproduce the bug?

No reliable reproduction steps yet.

Observed pattern:

1. Launch Codex Desktop on Windows and use it normally.
2. At some point, severe system-wide stuttering may begin.
3. Fully exit the Codex / ChatGPT desktop app.
4. Start the app again.
5. System responsiveness returns to normal.

What is the expected behavior?

Codex Desktop should remain responsive during extended use and should not degrade the responsiveness of the rest of Windows.

Users should not need to periodically restart the app to restore normal system performance.

Additional information

• The issue is intermittent.
• The reproduction condition is currently unknown.
• Restarting the desktop app is a reliable temporary workaround once the slowdown occurs.

Start with the Windows x64 desktop-app behavior described for build 26.810.50856 and compare this report with issues #38547 and #38554. There is no reliable reproduction sequence or named source file; first gather diagnostics around the intermittent system-wide stutter and verify whether restarting Codex restores responsiveness. Done means identifying a reproducible trigger or useful root-cause evidence and preventing the degradation.