after upgrading to 3.0.16, and enable Agents Window, the editor window often looks frozen. Checking in task manager, I can see 20+ processes created, and CPU usage is above 20% sometimes
I have run cursor –disable-gpu but not helpful(I dont have GPU)
Where does the bug appear (feature/product)?
Cursor IDE
Cursor CLI
Background Agent (GitHub, Slack, Web, Linear)
BugBot
Somewhere else…
Describe the Bug
The UI appears very busy, and responses from model is very slow. I ask questions in both chat and agents windows. sometimes the answer never comes back.
Steps to Reproduce
How can you reproduce this bug? We have a much better chance at fixing issues if we can reproduce them!
…start the app(sometimes show agents window and main window, sometims only show agents window and main editor window doesn’t show up)
ask a question
Expected Behavior
expect smooth ask/answer and execute my commands
Screenshots / Screen Recordings
below is the task manager when I run no task at all in cursor
For AI issues: which model did you use?
not AI issue.
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
Add any other context about the problem here.
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!
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
Add any other context about the problem here.
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!
Hey, thanks for the report. I see the Task Manager screenshot with 18 Cursor processes, and two of them are each using about 23% CPU while idle. That’s definitely not normal.
To figure out which component is causing the load, I’ll need a couple things:
Cursor Process Explorer: Ctrl+Shift+P > Developer: Open Process Explorer. It shows what those processes are, like extensionHost, renderer, ptyHost, etc. Please share a screenshot from there.
Test without extensions: run cursor --disable-extensions from the command line. If the freeze goes away, it’s likely caused by an extension.
Test without Agents Window: try disabling Agents Window and switching back to the normal layout. Does the freeze still happen?
After updating Cursor from version 2.5 to 2.6/3.0, the editor starts showing many small white dots/visual artifacts across the interface. The issue appears only in the newer versions and disappears when I downgrade back to Cursor 2.5. It looks like a rendering or graphics glitch rather than a project-specific problem.
Steps to Reproduce
Install Cursor 3.0.16 on Windows 11.
Open the IDE normally.
Observe the interface after launch.
White dots / visual artifacts appear across the screen.
Downgrade to Cursor 2.5 and reopen the same setup.
The issue no longer appears.
Expected Behavior
Cursor should open normally without visual artifacts, white dots, or rendering glitches.
Not applicable — this appears to be a rendering/UI issue, not an AI/model issue.
For AI issues: add Request ID with privacy disabled
Not applicable.
Additional Information
The issue started after upgrading to Cursor 2.6 / 3.0.16. Cursor 2.5 works correctly on the same machine with the same project and environment. This strongly suggests a version-specific rendering bug. The problem appears as white dots/visual artifacts in the IDE UI.
Hey @Abubakar_Hassan, I see the screenshot. This is a known issue with GPU rendering in Chromium and Electron on Windows. We’ve had a few similar reports, and they were all fixed the same way.
I added "disable-hardware-acceleration": true in argv.json , fully restarted Cursor, and the white dots / visual glitch issue is now gone. It looks like the problem was related to GPU rendering on my machine. Thanks for the help.
I added “disable-hardware-acceleration”: true in argv.json, restarted Cursor fully, and the issue is now fixed. The white dots / visual glitch no longer appear on my side.
@deanrie I’m hitting the same issue that @Ron_Yan has reported. (I see that this thread has sprouted a few different unrelated issue reports; so it goes.)
Note that the editor window is not hung; it remains usable, although the hung agents window prevents the IDE from exiting without Force Quit – and, of course, background agents are unavailable unless I navigate to the website.
The new Agents Window hangs 100% of the time for me after a few seconds of being open. Processs Explorer screenshot below w/ window [2] (Cursor Agents) spinning at 100-200% of CPU.
The behavior reproduces even if I --disable-extensions. Windows is N/A. My workspace is medium-sized, perhaps 2,500 files.
That’s the Google Gemini Code Assist extension. Its a2a-server runs as a separate agent and often conflicts with Cursor Agent. Try disabling or uninstalling that extension Extensions > ms/google.geminicodeassist > Disable, then restart Cursor. I think CPU usage should calm down after that.
To switch from the Agents Window back to the normal layout:
Cmd+Shift+N
@xeger-ck, your case is different. window [2] Cursor Agents by itself is running at 108% CPU, so it’s not an extension. A few questions:
The Request ID from the stuck Agents window right click in chat > Copy Request ID, if Privacy Mode allows it
Does it reproduce if you open Cursor on an empty new workspace without your 2 500 files
After it hangs, do ptyHost and extensionHost also stay high in Process Explorer, or only window [2]
Workaround for now: don’t open the standalone Agents window, use the inline Agent in the main window you already have Layout: editor. If the Agents window is already stuck and blocks you from closing the IDE, Force Quit is unfortunately the only way out. This is a known separate bug on macOS.
About the delay: fair point. 5 days between replies is a long time, sorry. This thread grew into a few different bugs, and I missed replying to you directly.
On the main issue: you disabled Google Gemini Code Assist. Did the freeze and high CPU go away, or can you still reproduce it? In your Process Explorer, a2a-server.mjs from that extension was using 11% CPU and 425 MB, so after disabling it things should look noticeably better. If the freeze is still there, please share a fresh Process Explorer screenshot and we’ll check what’s at the top now.
About the Agents Window switching back to the classic layout on Windows:
Ctrl+Shift+N toggles between Agents Window glass and the normal editor layout
After that, in About you’ll see Layout: editor instead of glass.
On the fact that this toggle isn’t obvious: agreed. I’ll pass this feedback to the team. Right now it’s not in a visible place in the UI, and that’s a real problem if the mode causes freezes and you want to exit it quickly.
Let me know how performance looks now after disabling the extension.
Why haven’t I received a response or had my bug report resolved? Could you please send me your email address? There’s a major bug that I can’t directly explain.
@Ron_Yan, awesome, glad it cleared up. If it comes back, reply in this same thread.
@jojolionss, to avoid mixing a few different bugs in one thread (we already have Windows freezes, visual artifacts, and the Agents Window hanging on macOS here), please open a separate topic in Bug Reports: Bug Reports - Cursor - Community Forum
Please fill out the bug report template with what exactly is happening, repro steps, your Cursor version (About Cursor > Copy), your OS, and screenshots or a video. Without those details, we can’t dig into a “major bug.” If it’s related to your account or billing and you’d rather not post publicly, email [email protected].
