Codex inserts random gibberish when editing documentation
Resolved 💬 4 comments Opened Sep 19, 2025 by JStanoeva Closed Nov 11, 2025
💡 Likely answer: A maintainer (etraut-openai, contributor)
responded on this thread — see the highlighted reply below.
What version of Codex is running?
0.39.0
Which model were you using?
gpt-5-codex
What platform is your computer?
flat (my wooden desk)
What steps can reproduce the bug?
In docs, Codex inserts random artifacts/gibberish (stuff like 'dY'�') in place of emoji/symbols other than letters.
What is the expected behavior?
Not gibberish for sure.
What do you see instead?
Gibberish.
Additional information
_No response_
4 Comments
This particularly annoying bug happened to me today. I hate emojis in my code. Why add them if you can't parse them moments later!?
i have same issue it does weird varations of character of "a" like "AAAaaAaAAaAAAaaaaaaAaAaaaAAaAAAaa"
Any fixes?
Thanks for the bug report. We've shared the feedback with the team members who are responsible for training our codex models. We're tracking this feedback and similar reports so we can make the model more robust in future iterations.
If you see other model behavior that you'd like to report, please use the recently-added /feedback command in the CLI. That will provide us with additional details including logs and conversation text.