This happens when `formatOnSave` in vs code is enabled and you are not using the imported package in your code.

The `formatOnSave` being enabled removes the unused imports.

To avoid the problem, you either disable `formatOnSave` or use the imports correctly.

Sometimes, when you know that you are using the imports just check if the functions of that package are spelled correctly while you are using them.

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When you save below code, the `fmt` import is removed becase, `println` is misspelled and the editor thinks you are not really using the `fmt` package.

Change it to capital `P`. The import is not removed when saving.

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package main

​

import "fmt"

​

func main() {

  fmt.println("hello world")

}