Agent Threads disappear randomly

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When I use the new Agent Window, sometimes threads randomly disappear. This can happen at any point in time it seems. I’ve observed it happen in these circumstances:

  • immediately after sending the first prompt,
  • during the thinking/implementation process while actively looking at the Agent (no hand on keyboard/mouse; I suddenly looked at another working Agent and couldn’t find the other one again, not even in the archive),
  • while reviewing an Agent’s changes made in a worktree (again, I suddenly looked at another Agent; hand only on mouse)

Steps to Reproduce

Unfortunately I haven’t found any logic as to when this happens.

Expected Behavior

My threads/Agents/… don’t just disappear into oblivion.

Operating System

Linux

Version Information

Version: 3.2.21
VSCode Version: 1.105.1
Commit: 806df57ed3b6f1ee0175140d38039a38574ec720
Date: 2026-05-03T01:46:14.413Z
Layout: glass
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Linux x64 6.19.12-200.fc43.x86_64

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

7

This is a known bug that our team is actively investigating. Several of our engineers have reported the same behavior, and we have active tracking issues covering it.

A couple of things that would help us narrow down which specific variant you’re hitting:

  1. Next time it happens, could you open Help > Toggle Developer Tools and check the Console tab for red error messages? A screenshot of the console output right after a thread disappears would be very useful for diagnosis.

  2. When a thread disappears, does reloading the window (Ctrl+Shift+P → Developer: Reload Window) bring it back?

Your agent data should still exist on disk even when threads vanish from the UI. You can check ~/.cursor/projects/ for the agent-transcripts/ subdirectory if you need to recover a specific session.