High memory / OOM crashes + Agent stuck on “Taking longer than expected” after recent updates

Support Bug Reports
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1

Hi team,

I’ve been experiencing severe performance issues with Cursor after recent updates. This has completely disrupted my workflow — I can no longer reliably finish tasks because the agent keeps hanging or the whole app crashes mid-session.

Symptoms

  • Cursor frequently consumes excessive memory and eventually crashes with OOM (out of memory) errors.
  • Agent/Composer regularly gets stuck on “Taking longer than expected…” for 20–30+ minutes and produces no changes at all.
  • The app becomes very slow and unresponsive during normal use, especially with longer Agent sessions.
  • I keep losing progress because the session dies while I’m in the middle of something.

I only have 16GB of RAM, but it was never this bad before. The problems became much worse after the launch of Grok 4.6. Before that I could work for extended periods without constant crashes or long hangs.

What I’ve already tried

  • Fully quitting Cursor (Cmd+Q / Task Manager)
  • Reloading the window
  • Starting new chats
  • Deleting old chats + running GC Agent KV Blobs
  • Reducing open files / using .cursorignore

These help temporarily, but the problems return fairly quickly and make it hard to get real work done.

2

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

To help us investigate and fix this faster, could you edit your original post to include the details from the template below?

Bug Report Template - Click to expand

Where does the bug appear (feature/product)?

  • Editor, Tab & Chat (autocomplete, Composer, in-editor agent)
  • Terminal & commands
  • Models, pricing & API keys (availability, Auto/Max, BYOK/Bedrock)
  • MCP & tools
  • Cloud Agents & Automations (cursor.com/agents, scheduled/event)
  • BugBot & Code Review
  • Cursor CLI
  • Cursor Mobile
  • Remote (SSH / Dev Containers / WSL)
  • Account, billing & login
  • Something else…

Describe the Bug
A clear and concise description of what the bug is.

Steps to Reproduce
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  1. …
  2. …
  3. …

Expected Behavior
What is meant to happen here that isn’t working correctly?

Screenshots / Screen Recordings
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Operating System

  • Windows 10/11
  • MacOS
  • Linux

Version Information

  • For Cursor IDE: Menu → About Cursor → Copy
  • For Cursor CLI: Run agent about in your terminal
IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)

For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…

Additional Information
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Does this stop you from using Cursor?

  • Yes - Cursor is unusable
  • Sometimes - I can sometimes use Cursor
  • No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!