Sortable JS Autoscroll Bug

HTML

<script src="https://raw.githack.com/SortableJS/Sortable/master/Sortable.js"></script>
<div class="container">
  <div class="item">Item 1</div>
  <div class="item">Item 2</div>
  <div class="item">Item 3</div>
  <div class="item">Item 4</div>
  <div class="item">Item 5</div>
  <div class="item">Item 6</div>
  <div class="item">Item 7</div>
  <div class="item">Item 8</div>
  <div class="item">Item 9</div>
  <div class="item">Item 10</div>
  <div class="item">Item 11</div>
  <div class="item">Item 12</div>
  <div class="item">Item 13</div>
  <div class="item">Item 14</div>
  <div class="item">Item 15</div>
  <div class="item">Item 16</div>
  <div class="item">Item 17</div>
  <div class="item">Item 18</div>
  <div class="item">Item 19</div>
  <div class="item">Item 20</div>
  <div class="item">Item 21</div>
  <div class="item">Item 22</div>
  <div class="item">Item 23</div>
  <div class="item">Item 24</div>
  <div class="item">Item 25</div>
  <div class="item">Item 26</div>
  <div class="item">Item 27</div>
  <div class="item">Item 28</div>
  <div class="item">Item 29</div>
  <div class="item">Item 30</div>
  <div class="item">Item 31</div>
  <div class="item">Item 32</div>
  <div class="item">Item 33</div>
  <div class="item">Item 34</div>
  <div class="item">Item 35</div>
  <div class="item">Item 36</div>
  <div class="item">Item 37</div>
  <div class="item">Item 38</div>
  <div class="item">Item 39</div>
  <div class="item">Item 40</div>
  <div class="item">Item 41</div>
  <div class="item">Item 42</div>
  <div class="item">Item 43</div>
  <div class="item">Item 44</div>
  <div class="item">Item 45</div>
  <div class="item">Item 46</div>
  <div class="item">Item 47</div>
  <div class="item">Item 48</div>
  <div class="item">Item 49</div>
  <div class="item">Item 50</div>
</div>

CSS

.container {
  max-height: 450px;
  border: 1px solid #eeeeee;
  overflow-y: auto;
}

.item {
  padding: 0.5rem;
  background: #fafafa;
  border-bottom: 1px solid #eeeeee; 
}

JavaScript

const container = document.querySelector('.container');

new Sortable(container, {
	scroll: true,
  scrollSensitivity: 128
});