Hey, thanks for the report. This intermittent GPT-5 Agent mode issue has come up a few times. Please try:
- Disable
HTTP/2:Ctrl + ,→ search “HTTP/2” → enable “Disable HTTP/2” → restart Cursor - Share a Network Diagnostics screenshot: Cursor Settings → Network → Run Diagnostics
- Check your environment: are you using a VPN, proxy, or corporate network?
If the issue happens again after these steps, let me know.