Bug: Markdown renderer displays LaTeX formulas incorrectly in Windows App 26.803.41515
What version of the Codex App are you using (From “About Codex” dialog)?
26.803.41515
What subscription do you have?
Business
What platform is your computer?
Microsoft Windows NT 10.0.26200.0 x64
What issue are you seeing?
Markdown rendering issue in Windows App.
When opening a Markdown document containing LaTeX formulas and tables, the Windows desktop app renders the content incorrectly.
Observed problems:
- LaTeX mathematical expressions are displayed as raw text instead of rendered formulas.
- Markdown tables have incorrect layout/formatting.
- The same .md file renders correctly in VSCode Markdown Preview.
This appears to be a Markdown renderer compatibility issue in the Windows App.
What steps can reproduce the bug?
- Create or open a Markdown (.md) file containing LaTeX formulas and Markdown tables.
Example:
$$
C_{33}=\rho g\pi r^2
$$
| Parameter | Value |
|---|---|
| rho | 1025 |
| g | 9.8 |
- Open the same Markdown document in ChatGPT Windows App version 26.803.41515.
- Compare the rendering result with VSCode Markdown Preview.
- Notice that VSCode renders correctly, while ChatGPT Windows App shows incorrect LaTeX and table formatting.
What is the expected behavior?
The Markdown renderer should correctly display standard Markdown syntax and LaTeX mathematical formulas.
The rendering result should be consistent with common Markdown preview tools such as VSCode Markdown Preview.
Additional information
Environment:
- OS: Windows 11
- App version: 26.803.41515
The issue is reproducible with different Markdown files.
The attached screenshot compares VSCode rendering and ChatGPT Windows App rendering sid
<img width="2048" height="1230" alt="Image" src="https://github.com/user-attachments/assets/6ff45ebc-e7e9-4452-b517-76d445362a1a" />
<img width="2048" height="1230" alt="Image" src="https://github.com/user-attachments/assets/16901fae-407a-480a-92e1-835a0d018d68" />
e by side.
No issue observed in VSCode using the same Markdown source file. #
3 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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Copy/pasting formula from ChatGPT to Microsoft Word fails. Clipboard holds "\(\boxed{f(n)=\frac14\max\left(0,\;1+\left\lfloor \log_2\left(\frac{n}{25}\right)\right\rfloor\right)}\)". To this layman, the error is "frac14" which should be "frac{1}{4}"
ChatGPT shows:
<img width="321" height="65" alt="Image" src="https://github.com/user-attachments/assets/b1f63087-9041-4a4d-bb9c-0548630d4d07" />
MS Word pastes as:
<img width="244" height="66" alt="Image" src="https://github.com/user-attachments/assets/ad15354c-4400-4b0a-9458-1fae2f1356a7" />
the raw $$...$$ showing up as text isn't really a render miss, it's a silent fallback: when the markdown pass hits a math block it can't parse it just prints the source instead of flagging unsupported syntax, so the doc "renders" clean while the math is quietly gone. the table degrades to plaintext the same way, nothing tells you the block failed. vscode's preview runs an actual katex/mathjax pass, so it fails loud (or renders), and that gap is the whole diff you're seeing side by side.