Calculate viewport height wrong when have duplicate element

I create HTML with 9 lis element `

GOLD FACTORY ```

    </li>

    <li id="2" data-game-id="2">
        <div>
            <div>
                <span>
                    <a href="#">JURASSIC PARK</a>
                </span>

            </div>
        </div>
    </li>

    <li id="3" data-game-id="3">
        <div>
            <div>
                <span>
                    <a href="#">GIRLS WITH GUNS</a>
                </span>

            </div>
        </div>
    </li>

    <li id="4" data-game-id="4">
        <div>
            <div>
                <span>
                    <a href="#">BATMAN DARK KNIGHT</a>
                </span>

            </div>
        </div>
    </li>

    <li id="5" data-game-id="5">
        <div>
            <div>
                <span>
                    <a href="#">RABBIT IN THE HEAD</a>
                </span>

            </div>
        </div>
    </li>

    <li id="6" data-game-id="6">
        <div>
            <div>
                <span>
                    <a href="#">NEON STAXX</a>
                </span>
            </div>
        </div>
    </li>

    <li id="7" data-game-id="7">
        <div>
            <div>
                <span>
                    <a href="#">GOLD FACTORY</a>
                </span>
            </div>
        </div>
    </li>

    <li id="8" data-game-id="8">
        <div>
            <div>
                <span>
                    <a href="#">JURASSIC PARK</a>
                </span>
            </div>
        </div>
    </li>

    <li id="9" data-game-id="9">
        <div>
            <div>
                <span>
                    <a href="#">GIRLS WITH GUNS</a>
                </span>
            </div>
        </div>
    </li>`


Following my html I try to config bxslider like this

`<script type="text/javascript">
        $(function () {
            var JackpotSliderCombineRows = $('#jp-combine-rows').bxSlider({
                mode: 'vertical',
                pager: false,
                controls: false,
                auto: true,
                moveSlides: 1,
                minSlides: 6,
                maxSlides: 6,
                autoDelay: 1000,
                speed: 200,
                infiniteLoop: true,
                autoHover: true,
                autoDirection: 'next'
            });
        });
    </script>`

I found problem when currentIndex = 4  children not add duplicate element to children variable 

` for (i = 1; i <= slider.settings.maxSlides - 1; i++) {
                        // if looped back to the start
                        if (currentIndex + i >= slider.children.length) {

                    children = children.add(slider.children.eq(i - 1));
                } else {
                    children = children.add(slider.children.eq(currentIndex + i));
                }
            }`



Then when calculate height it will wrong

`children.each(function (index) {
                    height += $(this).outerHeight();
                });`

stevenwanderski / bxslider-4

Calculate viewport height wrong when have duplicate element #1027