openai / openai/codex

ChatGPT Windows app – broken response formatting

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app bug windows-os
Dominant language
Rust
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Description

I'm experiencing a persistent formatting issue in the ChatGPT Windows desktop app.
The problem began on September 17, 2026. Initially, responses displayed visible code instead of properly formatted text. After uninstalling and reinstalling ChatGPT, the visible code disappeared, but responses now display with missing paragraph breaks.
I've already tried uninstalling, reinstalling, and resetting the Windows app. None of these steps resolved the issue.
I tested ChatGPT in Chrome's incognito mode, and responses display correctly there. The same response displays incorrectly in the desktop app but correctly in Chrome.
This appears to be a Windows desktop app rendering issue. Please investigate whether this is a known bug and whether a fix is available.

(ChatGPT 26.911.7940.0, Windows 11 25H2 26200.9457):

Contributor guide

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First steps

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the formatting issue in the ChatGPT Windows desktop app version 26.911.7940.0 on Windows 11 25H2, then compare the same response in Chrome incognito mode. Done means responses render with the expected code formatting and paragraph breaks in the desktop app.

Written by the indexing model from the issue text.

Assessment

Domain
desktop, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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