[Windows][26.825.6671.0] App opens to completely white screen while renderer, GPU process and codex.exe are running

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

26.825.6671.0

What subscription do you have?

PLUS

What platform is your computer?

Windows 10 x64

What issue are you seeing?

After launching the Codex/ChatGPT Windows desktop app, the application window appears normally, including the native title bar and window controls, but the entire client area remains completely white.

The application does not crash.

This differs from #41752 because renderer processes and codex.exe are successfully created in my case.

While the white window is open, I can see:

Main ChatGPT.exe
Crashpad processes
ChatGPT.exe --type=gpu-process
Network utility process
Storage utility process
Two ChatGPT.exe --type=renderer processes
codex.exe

Example renderer state:

ChatGPT.exe --type=renderer --renderer-client-id=5

ChatGPT.exe --type=renderer --renderer-client-id=6

GPU process:

ChatGPT.exe --type=gpu-process

Codex app-server/process:

C:\Users<user>\AppData\Local\OpenAI\Codex\bin...\codex.exe

The processes remain running while the application window stays completely white.
Windows Application Event Log does not report an Application Error, Application Hang, or obvious Codex/ChatGPT crash when this happens.

Microsoft Edge WebView2 is installed.

Repairing and resetting the Windows app did not resolve the issue.

ChatGPT works normally in a web browser on the same computer/network/account.

I am also seeing the same white-screen behavior on another computer, suggesting this may not be isolated to one machine.

What steps can reproduce the bug?

Install/update Codex from Microsoft Store to version 26.825.6671.0.
Launch Codex/ChatGPT.
The native application window appears.
The entire client area remains white indefinitely.
Open Task Manager/PowerShell.
Observe that GPU, utility and renderer processes are running.
Observe that codex.exe is also running.
No normal application crash is recorded in Event Viewer.

What is the expected behavior?

After the native window and renderer processes start, the Codex UI should render normally.

Instead, Chromium appears to successfully initialize its renderer/GPU process tree while the client area never paints anything except white.

Additional information

#41752 — Same 26.825.6671.0 release, but that report has no renderer/app-server. In this case both renderer processes and codex.exe are present.

#40878 — Very similar completely blank client-area/rendering failure on an earlier Windows Codex build.

This may therefore be another presentation/rendering regression in the current Windows release rather than the exact startup failure described in #41752.

Start by reproducing the white client area on Windows 10 with Codex 26.825.6671.0 and confirming the renderer, GPU, utility, and codex.exe processes remain active. Compare the behavior with related issues #41752 and #40878; done means identifying and fixing the rendering or startup failure so the desktop UI paints normally.