Hey @kyle_swire-thompson,
So I suspect it is the same issue that is seen with npm on windows and something is blocking the connection, When I was looking before I couldn’t find anything obvious in the windows settings and even took the approach of disabling the windows firewall fully.
The best option here would be to move away from the tunnel if you are planning to use n8n for more than just testing and if you are testing something like a cloudflare tunnel would work or ngrok.