Issue Station
Sign In
Tools hereToolbox

codex - 💡(How to fix) Fix Codex windows app 26.527.31326 fullscreen focused window becomes transparent

Official PRs (…)
ON THIS PAGE

Recommended Tools

×6

Utilities matched from this issue’s tags and category — try them while you read without losing context.

GitHub issue graph ai analysis

Paste a GitHub issue URL. We fetch that issue, discover linked issues from bodies/comments/timeline, collect linked pull requests, and produce a structured English report.

The report is written in English Markdown for sharing and archival.

Helpful · Quick feedback

Loading…

Root Cause

This looks like a Windows/Electron/Chromium GPU compositing regression in the recent Codex Windows app update, possibly related to fullscreen focused rendering. It does not look like a missing Visual C++/.NET runtime issue because the app launches and works normally except for this fullscreen focused rendering problem.

RAW_BUFFERClick to expand / collapse

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

26.527.31326

What subscription do you have?

ChatGPT Free

What platform is your computer?

Windows 10.0.19044 x64

What issue are you seeing?

After the latest Codex Windows app update, Codex has a fullscreen rendering issue.

When the Codex window is fullscreen/maximized and focused, part of the app becomes visually transparent and the Windows desktop icons show through the Codex window.

If I click the Windows taskbar so Codex loses focus, the window renders normally again. When I click back into Codex, the issue returns.

This did not happen on the same computer with previous Codex versions.

Transparency effects are disabled in Windows, but the issue still happens.

What steps can reproduce the bug?

  1. Open Codex Windows app.
  2. Maximize/fullscreen the Codex window.
  3. Click inside Codex so the app is focused.
  4. Observe that part of the Codex window becomes transparent and the desktop shows through.
  5. Click the Windows taskbar so Codex loses focus.
  6. Observe that Codex renders normally while unfocused.
  7. Click Codex again.
  8. The transparency/rendering issue returns.

What is the expected behavior?

Codex should render normally while fullscreen/maximized and focused.

Additional information

GPU: AMD Radeon HD 8950 GPU driver: latest available Display: 1920x1080, 100% scaling OS transparency effects: disabled

This looks like a Windows/Electron/Chromium GPU compositing regression in the recent Codex Windows app update, possibly related to fullscreen focused rendering. It does not look like a missing Visual C++/.NET runtime issue because the app launches and works normally except for this fullscreen focused rendering problem.

<img width="1920" height="1042" alt="Image" src="https://github.com/user-attachments/assets/459b7b87-bbcb-43ad-9740-77c99a9b76e9" /> <img width="1920" height="1039" alt="Image" src="https://github.com/user-attachments/assets/f4f02efa-8982-431d-9705-5f4e8bd26af4" />

Vote matrix · Quick signals

Works
Did the solution work? Tap to confirm.
Easy Fix
Was it a quick fix?
Time Saver
Did it save you time?
Blocking
Was it severely blocking?
Common Issue
Are others likely hitting this too?
Flaky / Intermittent
Is it intermittent?
Verified / Reproducible
Can you reproduce it reliably?
Loading…

Still need to ship something?

×6

Another batch ranked right after the header list — different links, same matching logic.

Back to top recommendations

TRENDING

codex - 💡(How to fix) Fix Codex windows app 26.527.31326 fullscreen focused window becomes transparent