问停止这个奇怪的jQuery小故障

EN

$(document).ready(function(){
        $(function(){
            $('#container').sortable({
                connectWith: "#container",
            cursor: "move"
        }).disableSelection();
    });
});

<div id="container">
  <div class="container-item">Item 1</div>
  <div class="container-item">Item 2</div>
  <div class="container-item">Item 3</div>
</div>

lists {
    height: 200px;
    width: 300px;
    border: 1px solid #000000;
}

#container {
    background: lightgrey;
    width:500px;
    height: 50px;
}
.container-item {
  display: inline-block;
  width: 150px;
  height: 500px;
  background: lightblue;
  margin-right: 10px;
  margin-top: 0;
  position: relative;
  max-top: 50px;
}