ComboBox reproducible issue

main.go

package main

import (
	"fmt"
	"log"
	"syscall"
	"time"

	"github.com/lxn/walk"
	. "github.com/lxn/walk/declarative"
)

type Config struct {
	ClientWindowTitle string
}

type WindowComboBoxItem struct {
	WindowTitle  string
	WindowHandle syscall.Handle
}

type TestWindow struct {
	MainWindow            *walk.MainWindow
	DataBinder            *walk.DataBinder
	CaptureWindowComboBox *walk.ComboBox
}

func main() {
	model := make([]*WindowComboBoxItem, 0)
	model = append(model, &WindowComboBoxItem{WindowTitle: "title1", WindowHandle: 0}, &WindowComboBoxItem{WindowTitle: "title2", WindowHandle: 1})

	app := NewTestWindow(Config{}, model)
	app.MainWindow.Run()
}

func NewTestWindow(config interface{}, comboBoxModel []*WindowComboBoxItem) *TestWindow {
	obj := TestWindow{}

	if err := (MainWindow{
		AssignTo: &obj.MainWindow,
		Title:    "ComboBox Test",
		MinSize:  Size{Width: 320, Height: 240},
		Size:     Size{Width: 400, Height: 600},
		Layout:   HBox{MarginsZero: false},
		DataBinder: DataBinder{
			AssignTo:        &obj.DataBinder,
			DataSource:      config,
			AutoSubmit:      true,
			AutoSubmitDelay: 1 * time.Second,
		},
		Children: []Widget{
			Composite{
				Layout: HBox{},
				Children: []Widget{
					Composite{
						Layout:    VBox{},
						Alignment: AlignHNearVNear,
						Children: []Widget{
							GroupBox{
								Title:  "Group settings",
								Layout: VBox{},
								Children: []Widget{
									GroupBox{
										Title:  "Capture region",
										Layout: HBox{},
										Children: []Widget{
											ComboBox{
												AssignTo:      &obj.CaptureWindowComboBox,
												Model:         comboBoxModel,
												ToolTipText:   "Client to capture",
												BindingMember: "WindowTitle",
												DisplayMember: "WindowTitle",
												Value:         Bind("ClientWindowTitle"),
												OnCurrentIndexChanged: func() {
													fmt.Printf("On index change triggered: %v", obj.CaptureWindowComboBox.CurrentIndex())
												},
												Editable: false,
											},
										},
									},
								},
							},
						},
					},
				},
			},
		},
	}.Create()); err != nil {
		log.Fatal(err)
	}

	return &obj
}