Side chat send_message fails

“This prevents a side-conversation assistant from delivering an explicitly authorized follow-up to the main task.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/codex/issues/9550/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Quiet. No reports and thumbs-up in the last two weeks, down from 3 a week at the early-October peak.

Sending a message to a thread fails from side chats. The mcp__codex_app__send_message_to_thread tool returns isError from a side chat, while read_thread succeeds and the identical call succeeds from a regular chat.

Is this your bug?

File my report

Where: Codex desktop app
Error text: 'sendRequest.bind' is not a function.
Versions: 26.1002.51308 to 26.1007.71326
Platforms: macOS
How bad: Breaks a normal workflow.

Not quite your bug?

list_threads/read_thread fail6 people
read_thread returns only content-reference placeholders for ChatGPT assistant replies8 people
Worktree threads missing from list2 people

Original reports3, newest first

Oct 18, 2026send_message_to_thread fails with "'sendRequest.bind' is not a function." from an ephemeral side chat, while the identical call succeeds from a regular chatOn GitHub#55023
Oct 8, 2026[macOS] Side chat to active parent fails with 'sendRequest.bind' is not a function (26.1002.52244)On GitHub#52392
Oct 7, 2026Codex desktop: send_message_to_thread fails with "'sendRequest.bind' is not a function"On GitHub#51790

Side chat send_message fails

Is this your bug? What gets counted gets fixed. Pile on.

Is this your bug?

Not quite your bug?

Original reports3, newest first

Do you work on Codex?