Component TTMSFNCToolBarItemPicker and dropdown

OS: Debian 10 (buster) LXDE
fpc 3.3.1
lazaraus 2.1

does not work (without the use of a mouse) dropdown if Editable: = true;
(the advantage of desktop applications is that they can work without a mouse)

unit Unit1;

{$mode objfpc}{$H+}

interface

uses
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, LCLTMSFNCToolBar;

type

{ TForm1 }

TForm1 = class(TForm)
TMSFNCToolBarItemPicker1: TTMSFNCToolBarItemPicker;
procedure FormCreate(Sender: TObject);
private

public

end;

var
Form1: TForm1;

implementation

{$R *.lfm}

{ TForm1 }

procedure TForm1.FormCreate(Sender: TObject);
begin
TMSFNCToolBarItemPicker1.Editable := true;

 TMSFNCToolBarItemPicker1.Items.Clear;
 TMSFNCToolBarItemPicker1.Items.Add('prvi');
 TMSFNCToolBarItemPicker1.Items.Add('peti');
 TMSFNCToolBarItemPicker1.Items.Add('drugi');
 TMSFNCToolBarItemPicker1.Items.Add('petnaesti');

end;

end.

We are currently investigating this.