Owl Carousel 2 bug report

HTML

<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.carousel.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.lazyload.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.autoheight.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.video.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.animate.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.autoplay.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.navigation.js"></script>
<script src="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/js/owl.hash.js"></script>
<link rel="stylesheet" href="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/css/owl.carousel.css">
<link rel="stylesheet" href="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/css/owl.lazyload.css">
<link rel="stylesheet" href="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/css/owl.animate.css">
<link rel="stylesheet" href="https://rawgit.com/OwlFonk/OwlCarousel2/develop/src/css/owl.autoheight.css">
<div id="posts">
<ul class='slides'>
<li class="slide"><div class="slider-image-wrap owl-lazy" data-src="http://www.sailing-team-germany.de/r2rstage/wp-content/uploads/sites/11/2014/06/STG14-1736-1400x933.jpg"><img class="owl-lazy" data-src="http://www.sailing-team-germany.de/r2rstage/wp-content/uploads/sites/11/2014/06/STG14-1736-1400x933.jpg"/></div><div class="slider-caption"><span>Die Edelmetallgewinner © Lars Wehrmann</span></div></li><li class="slide"><div class="slider-image-wrap owl-lazy" data-src="http://www.sailing-team-germany.de/r2rstage/wp-content/uploads/sites/11/2014/06/STG14-1651-1400x933.jpg"><img class="owl-lazy" data-src="http://www.sailing-team-germany.de/r2rstage/wp-content/uploads/sites/11/2014/06/STG14-1651-1400x933.jpg"/></div><div class="slider-caption"><span>Siegmund Mainka und Robert...

CSS

@charset "UTF-8";/*! normalize.css v3.0.0 | MIT License | git.io/normalize */html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background:transparent}a:active,a:hover{outline:0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:bold}dfn{font-style:italic}h1{font-size:2em;margin:0.67em 0}mark{background:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-0.5em}sub{bottom:-0.25em}img{border:0}svg:not(:root){overflow:hidden}figure{margin:1em 40px}hr{-moz-box-sizing:content-box;box-sizing:content-box;height:0}pre{overflow:auto}code,kbd,pre,samp{font-family:monospace, monospace;font-size:1em}button,input,optgroup,select,textarea{color:inherit;font:inherit;margin:0}button{overflow:visible}button,select{text-transform:none}button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}input{line-height:normal}input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0}input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button{height:auto}input[type="search"]{-webkit-appearance:textfield;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box}input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none}fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:0.35em 0.625em...

JavaScript

var owlOptions = {
    items:1,
    dots:false,
    nav:true,
    navText:["‹","›"],
    lazyLoad:true,
    loop:true
};

// Append zoom button. Needs to be attached before initialisation
$('body').on('initialized.owl.carousel', '.slides', function(event) {
    $('.owl-controls', event.target).append('<div class="owl-magnify">+</div>');
    });

$(document).on('click', '.owl-magnify', function() {
    var $carousel = $(this).closest('.slides');
    if ($(window).width() > 816 && !$carousel.hasClass('alignfull')) {
       $carousel.data('owl.carousel').invalidate('all'); $carousel.addClass('alignfull').trigger('refresh.owl.carousel');
    }
});

// Carousel for galleries
$('.slides').owlCarousel(owlOptions);