Excel attachment send hangs

“After entering a text instruction and clicking Send, the send control keeps spinning and both the file and text remain in the composer.”

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/23453/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

Growing. 12 reports and thumbs-up in the last 7 days and 5 the week before. A workaround is known.

Excel attachments leave Send spinning and message unsent. After an .xlsx thumbnail appears in the composer and Send is clicked, the control keeps spinning, file and text stay, and no error shows.

Is this your bug?

File my report

Where: Desktop app composer
Versions: 26.1026.10807 to 26.1027.51404
Platforms: macOS, Windows
How bad: Breaks a normal workflow.

Related: Follow-up messages won't send

Not quite your bug?

XLSX send hangs2 people
XLSX attachment spins indefinitely5 people
Follow-up messages cannot be sent40 people

Original reports11, newest first

Nov 4, 2026[macOS desktop] Spreadsheet attachment leaves send button spinning after app updateOn GitHub#59556
Nov 3, 2026Excel attachments cannot be sent in the macOS Codex appOn GitHub#59126
Nov 3, 2026[Windows] Excel attachment Send spins indefinitely on package 26.1027.6604.0; same workbook works via local pathOn GitHub#59092
Nov 3, 2026[Windows] Excel attachments keep loading and prevent messages from being sentOn GitHub#59080
Nov 2, 2026Windows: Sending a message with an Excel attachment fails and returns to the composerOn GitHub#59044
Nov 2, 2026cannot upload xslx fileOn GitHub#58828
Oct 31, 2026Windows desktop app: Excel attachment hangs on “Sending” and times out; same file works on webOn GitHub#58575
Oct 31, 2026macOS: small valid XLSX locks composer with spinning Send; persists after Mac rebootOn GitHub#58531
Oct 30, 2026macOS 26.1027.30824: all tested Excel attachments hang on send and lock the composer; PDFs workOn GitHub#58435
Oct 30, 2026Windows desktop: XLSX attachments leave Send spinning without an error; same files work on webOn GitHub#58432

Show all 11Show only the newest 10

Oct 30, 2026macOS desktop: XLSX attachments stay pending with spinning send control on 26.1027.30824On GitHub#58302