Chat window breaks when having both IDE and agent view open

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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When having both the agent view and IDE open in the same conversation. The whole conversation breaks.

Steps to Reproduce

Start a chat in agent view. Then open IDE in the same conversation. Conversation breaks. All chat text by the agent is no longer visible and I just get blank pages.

The only solution is to restart both the agent and the IDE and keep the conversation closed in either one.

Screenshots / Screen Recordings

Screenshot 2026-09-01 135337.png
Screenshot 2026-09-01 135337.png753×678 7.25 KB

Operating System

Windows 10/11

Version Information

Version: 3.18.9 (system setup)
VS Code Extension API: 1.128.0
Commit: 2ba48ff3f7514cc4643c52ca9f7b3173d9b66130
Date: 2026-08-27T01:42:22.092Z
Layout: IDE
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.291
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Auto Cost

For AI issues: add Request ID with privacy disabled

Request ID: eae6fff1-6ecd-4f6b-8428-e9c8bbee4fd8

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

4

Breakage happens both on the IDE and on the agents window:

image
image496×619 8.03 KB

6

Hey, thanks for the detailed report with screenshots and the Request ID.

This is a known issue we’re tracking. If the same conversation is open at the same time in the agents window and in the IDE, only one window gets live updates. The other can show the chat with missing message text, like the blank pages in your screenshots. Your chat history is safe, only the display breaks.

For now, the best workaround is to keep the conversation open in only one window at a time. If the chat shows up empty, you don’t need to restart anything. Switch to another chat and back, or run Reload Window from the command palette using Ctrl+Shift+P, and the messages should come back.

I’ve passed your report to the team. I’ll post an update here when I have one.