Design mode: messages cannot be sent

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

In Design mode, messages can no longer be sent. After typing a prompt and pressing Enter / clicking Send, nothing is submitted. Switching to Agent mode works normally.

Steps to Reproduce

  1. Open a chat and switch to Design mode
  2. Type any message (optionally with an image attached)
  3. Press Enter or click Send
  4. The message is not sent

Expected Behavior

The message is sent and the agent responds.

Screenshots / Screen Recordings

CleanShot 2026-10-12 at 10.20.13.gif

Operating System

MacOS

Version Information

Version: 3.24.12 (Universal)
VS Code Extension API: 1.128.0
Commit: 37b865941ccb31e2fc90c685157534efca87f960
Date: 2026-10-09T20:56:41.904Z
Layout: Agent Window
Build Type: Stable
Release Track: Default
Electron: 42.10.0
Chromium: 148.0.7778.280
Node.js: 24.18.1
V8: 14.8.178.38-electron.0
xterm.js: 6.1.0-beta.291
OS: Darwin arm64 27.0.0

Does this stop you from using Cursor

Yes - Cursor is unusable

5

Downgrading to the previous version will avoid this issue.

Version: 3.23.23
VS Code Extension API: 1.128.0
Commit: 2dac2428994fe34f12658d9ecad1541b98db2c00
Date: 2026-10-05T01:43:43.807Z
Layout: Agent Window
Build Type: Stable
Release Track: Default
Electron: 42.10.0
Chromium: 148.0.7778.280
Node.js: 24.18.1
V8: 14.8.178.38-electron.0
xterm.js: 6.1.0-beta.291
OS: Darwin arm64 27.0.0

7

Hey @sinar_pandora, thanks for the recording.

Staying on 3.23.23 is the right call for now. If you end up back on 3.24.12, screenshot the element yourself (Cmd+Ctrl+Shift+4 copies it to your clipboard), paste it into the regular chat, and describe the change there. Cmd+L runs into the same issue, so I’d skip that one.

It sends fine on a simple page on my end, so something on your page seems to trigger it. If you’re up for one more try on 3.24.12: does Design mode send on example.com? And could you share any lines that show up under Help > Toggle Developer Tools > Console (type DesignMode in the filter) after a failed send on your page?

I’ll post here when I have more to share.

8

@mohitjain Hi, after re-upgrading, the issue is fixed. I’ll keep tracking it, and if I run into it again, I’ll use the method you suggested to provide debug logs.