Subagents freeze after 3.19.13 update?

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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Just installed the 3.19.13 update.

Agent Window

Subagents often show ‘Stopped’ while the main agent shows ‘Waiting for subagent’. I can’t check the details of the subagent and it’s always ‘This chat could not be loaded.’

Have to send “Continue” on the main agent to solve the freeze and then I can load the subagent chat.

Steps to Reproduce

Ask an agent to assign a subagent

Operating System

Windows 10/11

Version Information

Version: 3.19.13 (user setup)
VS Code Extension API: 1.128.0
Commit: dd066f332fcea7382764400fde902f61920648d0
Date: 2026-09-04T17:41:16.065Z
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: Windows_NT x64 10.0.20348

Does this stop you from using Cursor

No - Cursor works, but with this issue

7

Hey there, thanks for the detailed report!

Quick unblock: your “Continue” trick is the right move, and reloading the window (Cmd/Ctrl+Shift+P → Developer: Reload Window) also clears it. The subagent is usually still running in the background, so the “Stopped” / “could not be loaded” is a display issue, not the subagent actually quitting.

This isn’t anything on your end, it’s an issue we’re tracking, and I’ll post back here when there’s an update.