Package names in import statement are removed automatically in VSCODE for .go file . How to resolve this?

I start typing the code in .go file using VSCODE Editor as below

package main
import (
    "fmt"
    "log"
    "math/rand"
    "net/http"
)
func main() {
    fmt.Println("Hello World!")
}

as soon as the above is typed I save the file and then I find that I have lost the statement I have typed in import and the code remains as follows

package main
import (
    "fmt"
)
func main() {
    fmt.Println("Hello World!")
}

though I am aware that the unused imports are automatically removed, I do not know how to resolve this. I need these packages for the remaining part of my source code and only with that understanding I have included these package names even when I began to write the code.

Which setting should I use to resolve this in VSCode Editor

> though I am aware that the unused imports are automatically removed, I
> do not know how to resolve this.

In vscode setting.json set this config

"": {
     "editor.codeActionsOnSave": {
            "source.organizeImports": false            
        }
}