mutable.Filter duplicates an element

package main

import (
	"fmt"

	"github.com/samber/lo/mutable"
)

type el struct {
	Key string
	Val any
}

func main() {
	doc := []el{
		{"foo", 234},
		{"bar", 345},
		{"baz", 111},
	}

	mutable.Filter(
		doc,
		func(e el) bool {
			return e.Key != "bar"
		},
	)

	fmt.Printf("Hello, World! %+v", doc)
}

Hello, World! [{Key:foo Val:234} {Key:baz Val:111} {Key:baz Val:111}]