Where does the bug appear (feature/product)?
Cursor IDE
Describe the Bug
Agents Window → Browser → Design Mode
Selecting an element on the page in the browser highlights it and opens a prompt window with the object referenced, but when I enter the text into the prompt and hit Enter, nothing happens. It’s as if the “Enter” button is never registered. I’m able to enter prompts normally in my Session chat window, but it does create an extra step. So not a complete roadblock, but a hassle. I tried clicking the input instead of hitting enter and had the same result.
Steps to Reproduce
See description
Expected Behavior
See description
Operating System
Windows 10/11
Version Information
Version: 3.12.10 (system setup)
VS Code Extension API: 1.128.0
Commit: 24a12dbd9cabf48956ce5bb3dbd234e41385b3d0
Date: 2026-07-16T03:15:48.538Z
Layout: Agent Window
Build Type: Stable
Release Track: Default
Electron: 40.10.3
Chromium: 144.0.7559.236
Node.js: 24.15.0
V8: 14.4.258.32-electron.0
xterm.js: 6.1.0-beta.256
OS: Windows_NT x64 10.0.26200
For AI issues: which model did you use?
Current using “Auto” mode.
Does this stop you from using Cursor
No - Cursor works, but with this issue
UPDATE: I ran into a few other issues and just decided to restart cursor. It’s working as intended now; but, I think this might have stemmed from the “Update” I applied.
Normally I have to open the Editor Window to check for updates and apply, but this time I used the Agents Window → Cursor icon in top left corner → Check for updates. Then afterwards I clicked the icon again and chose “Install updates…”. It rebooted back into Agents window and I continued my session. That’s when I started noticing the weird behavior.
I do think the Agents Window needs better visibility when there’s a pending update, and if this installation was any indication (my first attempt installing an update this way), then it might cause an erroneous “state” in the application, leading to some bizzarre behavior like this Design Mode issue. There were other problems as well (‘Files’ explorer not working properly, .md files not opening in a new tab, etc…but it may not be worth mentioning them all here and instead just saying “application got in a bad state until restart”).
Glad it sorted itself out after the restart, and thanks for the really thorough follow-up. Your read is almost certainly right: a full quit and reopen clears transient states like this, and applying an update can leave things half-applied until the app fully restarts, which lines up with the mix of odd behavior you saw (Design Mode, Files explorer, .md tabs) all clearing at once.
For now, the reliable reset after any update is a full quit (not just a window reload) and reopen, which you’ve already found.
The feedback on the Agents Window needing clearer visibility for pending updates is a good call. We’ll track this thread to gauge interest so the team can prioritize accordingly. If the Design Mode Enter issue ever comes back on its own (not right after an update), reply here with a quick screen recording and we’ll dig into that specifically.