XLSX send hangs

“The attachment thumbnail appears, but Send keeps spinning and the message never reaches the conversation.”

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/25543/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

Send spins forever when attaching XLSX in desktop app. The attachment thumbnail appears but the message never reaches the conversation; screenshots send successfully, and a ZIP-wrapped workbook sends normally.

Is this your bug?

File my report

Where: Desktop composer
Versions: 26.1029.61003
Platforms: macOS
How bad: Breaks a normal workflow.

Not quite your bug?

Excel attachment send hangs17 people
XLSX attachment spins indefinitely5 people
PowerPoint attachments leave Send button spinning indefinitely in desktop app4 people

Original reports2, newest first

Nov 5, 2026macOS: XLSX send hangs in Codex chats/tasks, while DOT and ZIP succeed (26.1029.61003)On GitHub#59773
Nov 4, 2026[macOS 26.1029.61003] Dragging an XLSX into Codex leaves Send spinning before uploadOn GitHub#59362