Connection errors constantly tonight

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

No matter the model I’m getting very consistent connection errors tonight. Diagnostics are all green within cursor/network settings. Not really sure what’s going on, does it with any mode it seems.

Steps to Reproduce

I try to perform any chats. It can be intermittent it will work for 20-30 seconds plan steps begin then connection error. Have restarted cursor, started new chats, even restarted my machine for good measure. I was using it pretty heavily today and it started at around 8pm eastern in the middle of an on going chat and has been degraded for at least two or so hours.

Some more context, it seems to be when it runs a command and looks at the output via powershell:

cd “D:\ai tools\wrtbench”; node --experimental-transform-types tests/test-llm-integration.ts 2>&1

It runs the following, begins looking at the output, and connection fails after that, and continues to do so.

Expected Behavior

I expect the chats to work.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version 2.0.69
VSCode Version: 1.99.3

For AI issues: which model did you use?

Sonnet 4.5, Composer 1

For AI issues: add Request ID with privacy disabled

Request ID: 149c004c-edc8-42ce-95b8-b163d5cde085

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the report. This pattern (works at first, then fails when reading terminal output) matches a known Agent bug when handling certain terminal exit codes or large output.

Quick fixes to try:

Disable HTTP/2 (most common fix):

  • Cursor Settings Ctrl/Cmd+, → search “HTTP/2” → enable “Disable HTTP/2” → restart Cursor

Check MCP servers (if configured):

  • Cursor has an 80‑tool limit that can cause connection failures
  • Disable any MCP servers you’re not actively using

Windows Firewall:

  • Your Windows firewall may need to re‑allow internet access for version 2.0.69

To help the investigation, please capture console logs when the error happens:

  • Help → Toggle Developer Tools → Console tab
  • Reproduce the error with your Node command
  • Screenshot or copy any red errors from the Console
  • Share here along with another Request ID from the failed connection

Similar issue with terminal output: The cursor cuts off the execution of the code at the stage

Let me know if disabling HTTP/2 helps.

1 Like
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