The IDE cannot be used; after 2-3 requests to the agent, the network freezes, as shown in the screenshot. The only solution is to re-enter the editor.
I tried changing the HTTP mode - it doesn’t help.
Thanks for the extra info. I see the issue is still happening even after the basic steps.
A few quick questions:
Which VPN are you using exactly? (service name)
When you tried “changing the HTTP mode”, did you switch to HTTP/1.1 or HTTP/1.0? Please explicitly set: Cursor Settings > Network > HTTP Compatibility Mode > HTTP/1.1 (not HTTP/2)
Can you share a full screenshot of the Network Diagnostics results? Not just the error, but all tests
Have you tried fully disabling the VPN and connecting directly through your home internet (not a mobile hotspot)?
Slow DNS (3 716 ms) and proxy buffering are usually related to the VPN or network setup. Some VPNs (for example, Tailscale) buffer Server-Sent Events, which breaks streaming. If HTTP/1.1 mode didn’t help, you may need to try a different VPN or run without it.
I’m experiencing a similar issue (I am using a custom API).
Not all chats are affected, but I get it randomly.
The cursor responds sometimes quickly, sometimes very slowly, and sometimes not at all. Once a chat is hung up, there’s no way to resume unless I start a new chat.
I’ve tried HTTP2, HTTP 1.1, and different networks, completely turned off the firewall, and didn’t use a VPN, but all to no avail.
One thing to clarify: the API endpoint works fine. Some tabs are working, but others aren’t. Generally, it’s quite random. But once it happens, the only way is to create a new chat.
I also checked the logs. There’s a request on the Cursor Dashboard (but the token is 0).
However, there are no requests from Cursor on the provider’s side.
This means: My PC → Cursor is OK.
The problem is coming from within the Cursor server.
