[v2] Virtual List with Accordion

Hi everybody.
So I was using Virtual List with Accordion like this: https://jsfiddle.net/9pm7x6ev/ and you can see it works just fine. But then I realized that I don’t need the subtitle on the item list.
And when I delete the subtitle on the item template, at first the virtual list load, but when you start scrolling down it’s empty for a moment and if you keep scrolling down, items start to appear again.
You can see in this example: https://jsfiddle.net/psnhfakb/

This is the item template i’m using with subtitle:

itemTemplate:
        '<li class="accordion-item">' +
          '<a href="#" class="item-content item-link">' +
            '<div class="item-inner">' +
              '<div class="item-title-row">' +
                '<div class="item-title">{{dia}}</div>' +
              '</div>' +
              '<div class="item-subtitle">{{dia}}</div>' +
            '</div>' +
          '</a>' +
          '<div class="accordion-item-content">' +
            '<div class="list media-list">' +
              '<ul>' +
                '<li id="opcion-anular-turno">' +
                  '<a href="#" class="item-link item-content">' +
                    '<div class="item-content">' +
                      '<div class="item-media">' +
                        '<i class="icon material-icons color-red">cancel</i>' +
                      '</div>' +
                      '<div class="item-inner">' +
                        '<div class="item-title">Anular turno</div>' +
                      '</div>' +
                    '</div>' +
                  '</a>' +
                '</li>' +
                '<li id="opcion-anular-turno">' +
                  '<a href="#" class="item-link item-content">' +
                    '<div class="item-content">' +
                      '<div class="item-media">' +
                        '<i class="icon material-icons color-green">thumb_up</i>' +
                      '</div>' +
                      '<div class="item-inner">' +
                        '<div class="item-title">Reservar turno</div>' +
                      '</div>' +
                    '</div>' +
                  '</a>' +
                '</li>' +
              '</ul>' +
            '</div>' +
          '</div>' +
        '</li>',

This is the item template i’m using without subtitle:

    itemTemplate:
            '<li class="accordion-item">' +
          '<a href="#" class="item-content item-link">' +
            '<div class="item-inner">' +
                '<div class="item-title">{{title}}</div>' +
            '</div>' +
          '</a>' +
          '<div class="accordion-item-content">' +
            '<div class="list media-list">' +
              '<ul>' +
                '<li id="opcion-anular-turno">' +
                  '<a href="#" class="item-link item-content">' +
                    '<div class="item-content">' +
                      '<div class="item-media">' +
                        '<i class="icon material-icons color-red">cancel</i>' +
                      '</div>' +
                      '<div class="item-inner">' +
                        '<div class="item-title">Anular turno</div>' +
                      '</div>' +
                    '</div>' +
                  '</a>' +
                '</li>' +
                '<li id="opcion-anular-turno">' +
                  '<a href="#" class="item-link item-content">' +
                    '<div class="item-content">' +
                      '<div class="item-media">' +
                        '<i class="icon material-icons color-green">thumb_up</i>' +
                      '</div>' +
                      '<div class="item-inner">' +
                        '<div class="item-title">Reservar turno</div>' +
                      '</div>' +
                    '</div>' +
                  '</a>' +
                '</li>' +
              '</ul>' +
            '</div>' +
          '</div>' +
        '</li>',