Windows 11 Insider Build 26200: ChatGPT Desktop continuously flickers before login, renderer remains alive (OpenAI.Codex 26.715.7063.0)

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

26.715.7063.0 (Microsoft Store - OpenAI.Codex)

What subscription do you have?

ChatGPT Team

What platform is your computer?

Windows 11 x64 Insider Dev Build 26200

What issue are you seeing?

Summary

The ChatGPT Desktop application continuously flickers immediately after launch and never becomes usable.

The login screen repeatedly refreshes, while the left sidebar and the main content area repaint independently at different frequencies.

The application never crashes, and all renderer processes remain alive.

This issue occurs every time the application starts.

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Environment

• ChatGPT Desktop (Microsoft Store)
• Package: OpenAI.Codex
• Version: 26.715.7063.0
• Windows 11 Insider Dev Build 26200
• NVIDIA RTX 4070 Laptop GPU
• Microsoft Edge WebView2 installed

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Expected behavior

The desktop application should display the login page normally and allow user interaction.

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Actual behavior

• Window continuously flickers.
• Sidebar and main content repaint independently.
• Login screen is never usable.
• Application remains running.
• No crash dialog appears.

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Troubleshooting already performed

• Reinstalled ChatGPT Desktop.
• Removed all application cache.
• Removed package data.
• Verified Microsoft Edge WebView2 installation.
• Disabled GPU rendering using --disable-gpu.
• Checked Windows Event Viewer (no crash logs).
• Captured ProcMon logs (no ACCESS DENIED or abnormal failures).
• Verified CPU usage is normal.
• Verified GPU usage is normal.
• Verified all ChatGPT renderer processes remain alive.
• Verified process IDs remain unchanged over time.
• Browser version of ChatGPT works normally.
• Microsoft Store works normally.
• VS Code and other Electron/Chromium applications work normally.

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Additional observations

This issue started after the recent ChatGPT Desktop update in July 2026.

Based on extensive troubleshooting, this appears to be a compatibility issue between ChatGPT Desktop version 26.715.7063.0 and Windows 11 Insider Dev Build 26200 rather than a local system configuration problem.

What steps can reproduce the bug?

1. Start Windows 11 Insider Dev Build 26200.
2. Launch ChatGPT Desktop (OpenAI.Codex 26.715.7063.0).
3. Wait for the application to initialize.
4. Observe that the login page immediately begins flickering.
5. The sidebar and main content continue repainting indefinitely.
6. The application never becomes usable.

What is the expected behavior?

The ChatGPT Desktop application should open normally, display the login page once, and remain stable without any UI flickering.

Additional information

Additional diagnostics performed:

• Renderer processes remain alive.
• Process IDs remain unchanged.
• No renderer recreation observed.
• CPU usage remains stable.
• GPU usage remains stable.
• Event Viewer shows no application crash.
• ProcMon shows no permission or file access failures.
• Disabling GPU acceleration does not resolve the issue.

Screen recording demonstrating the issue is attached.

If needed, I can also provide:

• ProcMon trace
• PowerShell diagnostic logs
• Additional system [information[](url)](

ChatGPT_Developer_Diagnostic_Package.zip

ChatGPT_BugReport_Attachment_Pack.zip

https://github.com/user-attachments/assets/2d54ad63-85d7-41c9-9799-4878bf3e34b0