[ChatGPT Web] Two-digit ordered list markers are clipped in the message composer

What issue are you seeing?

On ChatGPT Web (chatgpt.com), ordered list markers are visually clipped in the message composer once the numbering reaches two digits.

Items 1. through 9. are displayed correctly while composing a message.

However, when the list reaches 10., the leading digit is clipped.

For example, while composing:

8. eight
9. nine
0. ten?
1. eleven?

The 10. marker appears as 0., and the 11. marker appears as 1..

However, after sending the message, the exact same list renders correctly:

8. eight
9. nine
10. ten?
11. eleven?

This indicates that the underlying ordered-list content is preserved correctly and that the issue appears to be limited to the composer/editor rendering while typing.

The submitted message itself is not corrupted.

<img width="846" height="375" alt="Image" src="https://github.com/user-attachments/assets/9df2de16-f801-4c9b-b0a0-fc1d4cf82612" />
<img width="491" height="415" alt="Image" src="https://github.com/user-attachments/assets/424fc16e-726d-440b-a719-9b3e92911c25" />

What steps can reproduce the bug?

1. Open ChatGPT Web at chatgpt.com.
2. Start a new conversation.
3. In the message composer, create a Markdown-style ordered list.
4. Continue adding items until the numbering reaches 10. and 11..
5. Observe the ordered-list markers before sending the message.
6. Send the message.
7. Compare the list before and after sending.

Example content:

1. one
2. two
3. three
4. four
5. five
6. six
7. seven
8. eight
9. nine
10. ten?
11. eleven?

While composing, the last items are displayed approximately as:

9. nine
0. ten?
1. eleven?

After sending, they render correctly as:

9. nine
10. ten?
11. eleven?

What is the expected behavior?

Ordered list markers should be fully visible in the ChatGPT message composer regardless of the number of digits.

For example:

9. nine
10. ten?
11. eleven?

The composer should allocate enough horizontal space for two-digit and larger ordered-list markers without clipping the leading digits.

Additional information

Product: ChatGPT Web
Site: chatgpt.com
Browser: Google Chrome 151
OS: macOS
Date observed: August 7, 2026

The issue appears to affect only the message composer/editor.

After the message is submitted, 10. and 11. render correctly, so this does not appear to be an issue with the underlying message content or Markdown parsing after submission.

I also reported this through OpenAI Help. The initial support response described the screenshot as consistent with a composer-only rendering/layout issue and suggested checking browser zoom and extensions as additional troubleshooting steps.

Scope note:
This report is specifically about the regular ChatGPT Web composer on chatgpt.com, not Codex CLI or Codex Desktop. I am filing it here because I could not find a public GitHub issue tracker specifically for the ChatGPT Web client.