Random Chinese text occasionally appears in scheduled heartbeat messages
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 52/100
Research direction
Start by reproducing a recurring scheduled task with heartbeat updates across multiple executions, using the reported automation ID and feedback ID as reference. Inspect the heartbeat generation path and confirm that completed messages contain only the expected metadata and task output, without unrelated appended text.
Written by the indexing model from the issue text.
Description
What version of the Codex App are you using (From “About Codex” dialog)?
26.715.31925
What subscription do you have?
Pro 20x
What platform is your computer?
Darwin 25.5.0 arm64 arm
What issue are you seeing?
Description
I’m using a scheduled task with a heartbeat in the Codex app. Occasionally, unrelated Chinese text is appended to the heartbeat output after the automation ID.
Examples:
<heartbeat> <automation_id>monitor-cc-safety-net-false-positives</automation_id> 天天啪
<heartbeat> <automation_id>monitor-cc-safety-net-false-positives</automation_id> 俺也去
The Chinese text was not included in my task prompt and does not appear to be related to the task, its output, or my project. The issue occurs intermittently rather than on every scheduled run.
Feedback ID: 019f5e6a-cc1e-76a2-aeb3-3b26cf26d1de
What steps can reproduce the bug?
Steps to reproduce
- Create a recurring scheduled task in the Codex app.
- Configure the task to send heartbeat updates.
- Let the task run across multiple scheduled executions.
- Check the heartbeat messages.
- Occasionally, unrelated Chinese text appears after the automation ID.
What is the expected behavior?
Expected behavior
The heartbeat message should contain only the expected heartbeat metadata and task output.
Additional information
Additional information
- Model:
GPT 5.6 Terra High - Automation ID:
monitor-cc-safety-net-false-positives - The scheduled task otherwise appears to run normally.
- The issue has occurred more than once with different Chinese text.
- A screenshot showing multiple occurrences is attached.
- I also submitted this bug through the Codex app’s feedback feature.
- Dominant language
- Rust
- Stars
- 125k
- Forks
- 19.5k
- Avg merge
- 1m
- Merged PRs (30d)
- 1k
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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