Running gopls version:
golang.org/x/tools/gopls v0.1.3
golang.org/x/tools/gopls@(devel)

settings:
"gopls": {
"useDeepCompletion": true,
"wantUnimportedCompletions": true,
},

What did you do?

Selected a completion of an unimported standard library package.

// Hello
package main

func _() {
	<> // trigger completion and select unimported package fmt
}

What did you expect to see?

The import being added after the package statement.

// Hello
package main

import "fmt"

func _() {
	fmt
}

What did you see instead?

The import was added before the package statement.

// Hello

import "fmt"

package main

func _() {
	fmt
}