Different outcome using debug mode and terminal

[tdu1-godaddy]

When I used debug mode in the first time, it works perfectly. However, after I have refreshed the swagger page and using the debug mode again, it gives me 404 not found error. But I tried to run on terminal using go run main/xxx.go where it is the main function, I can connect to my localhost swagger page not sure why.

This is my launch.json setup, I think it is the default basic one.

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Package",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "main/xxx.go"
        }
    ]
}

The result is 404 not found, when I run the debug mode and works find when I run on the terminal. Need help on it, thanks.