Agents freeze on grepping and subagents running. Composer and 5.5 used. Restarting IDE helps for a while but then the problem gets back. Sometimes it unfreezes by itself and sometimes it just last forever.
Reinstallation of IDE did not jelp
Steps to Reproduce
run planning or something in agent mode where largely grepping and subagents used. I usually run multiple agents concurrently
Not only with Grep, but also with Glob—I don’t understand the difference, but in short, it happens with any use of the built-in search tool. A partial workaround is to tell the agent not to use these tools and use Shell commands, but with enough context, the agent quickly forgets and gets stuck in an endless search again.
I haven’t noticed any issues with sub-agents on my end, but maybe I don’t use them very often.
Having the exact same issue since 2 hours ago. No difference when using different models; tried GPT 5.5 and Composer 2 but no change. Grep stuck forever.
Hey @stonianua,
This is a known performance issue affecting agent tool operations (Grep, Glob, and others) in recent versions. Our engineering team is actively working on fixes – the root cause has been identified and multiple patches are in progress.
A few things you can try while we ship the fixes:
Restart Cursor (full quit and relaunch, not just Reload Window) when the freeze occurs – this temporarily clears the issue
Reduce concurrent agents – running multiple agents simultaneously makes the freeze more likely
We’re working on getting the fixes into a stable release. I’ll update this thread once the patches ship.
To @Fabz , @Duugrim , @j-173 , @almkvist – thank you for confirming and sharing details. The rollback data point and the clarification about Glob and git diff being affected too is helpful.
