Owl Carousel 2 bug report

HTML

<link rel="stylesheet" href="http://owlcarousel.owlgraphic.com/assets/owlcarousel/assets/owl.carousel.min.css">
<div id="owl-demo" class="owl-carousel">
    <div class="item"><h4>1</h4></div>
</div>

CSS

.owl-carousel .item {
    height: 200px;
    background: #4DC7A0;
    padding: 1rem;
}

JavaScript

/**
 * Owl carousel
 * @version 2.0.0-beta.3
 * @author Bartosz Wojciechowski
 * @license The MIT License (MIT)
 * @todo Lazy Load Icon
 * @todo prevent animationend bubling
 * @todo itemsScaleUp
 * @todo Test Zepto
 * @todo stagePadding calculate wrong active classes
 */
;(function($, window, document, undefined) {

	/**
	 * Creates a carousel.
	 * @class The Owl Carousel.
	 * @public
	 * @param {HTMLElement|jQuery} element - The element to create the carousel for.
	 * @param {Object} [options] - The options
	 */
	function Owl(element, options) {

		/**
		 * Current settings for the carousel.
		 * @public
		 */
		this.settings = null;

		/**
		 * Current options set by the caller including defaults.
		 * @public
		 */
		this.options = $.extend({}, Owl.Defaults, options);

		/**
		 * Plugin element.
		 * @public
		 */
		this.$element = $(element);

		/**
		 * Proxied event handlers.
		 * @protected
		 */
		this._handlers = {};

		/**
		 * References to the running plugins of this carousel.
		 * @protected
		 */
		this._plugins = {};

		/**
		 * Currently suppressed events to prevent them from beeing retriggered.
		 * @protected
		 */
		this._supress = {};

		/**
		 * Absolute current position.
		 * @protected
		 */
		this._current = null;

		/**
		 * Animation speed in milliseconds.
		 * @protected
		 */
		this._speed = null;

		/**
		 * Coordinates of all items in pixel.
		 * @todo The name of this member is missleading.
		 * @protected
		 */
		this._coordinates = [];

		/**
		 * Current breakpoint.
		 * @todo Real media queries would be nice.
		 * @protected
		 */
		this._breakpoint = null;

		/**
		 * Current width of the plugin element.
		 */
		this._width = null;

		/**
		 * All real items.
		 * @protected
		 */
		this._items = [];

		/**
		 * All cloned items.
		 * @protected
		 */
		this._clones = [];

		/**
		 * Merge values of all items.
		 * @todo Maybe this could be part of a plugin.
		 * @protected
		 */
		this._mergers = [];

		/**
		 * Widths of all...