Subagent behavior has been quite broken for the past couple of weeks

[sk_monkeytyper]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When I run a query that spawns multiple subagents (or when I use /best-of-n), it It shows the subagents as Stopped. But a while later the subagents switch to Completed status and I do get a valid response sometimes.

Steps to Reproduce

/best-of-n query or a query which spawns multiple subagents

Expected Behavior

I should be able to click on the sub agent & view the progress of the sub agent in a separate window.

Screenshots / Screen Recordings

Operating System

MacOS

Version Information

Version: 3.15.6
VS Code Extension API: 1.128.0
Commit: a1f686545fd0ce8917bbd2449f733551a9bce420
Date: 2026-08-06T01:41:03.876Z
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: Darwin arm64 25.6.0

For AI issues: which model did you use?

Gpt Sol 5.6

Does this stop you from using Cursor

No - Cursor works, but with this issue

[Colin]

Hey, thanks for the detailed report!

@sk_monkeytyper

When I run a query that spawns multiple subagents (or when I use /best-of-n), it It shows the subagents as Stopped. But a while later the subagents switch to Completed status and I do get a valid response sometimes.

This specific behavior was fixed shortly after your build (3.15.6) was cut, so updating to the latest version should clear up the false “Stopped” statuses (the latest version is v3.17).

Could you update and let us know if you still face the issue?

[sk_monkeytyper]

I don’t have access to the new update yet.