当元素被拖放时，删除被拖动元素的克隆

Question

在下面的代码中，有时当我将列表项拖动到列表中的新位置然后释放时，由拖动创建的元素的克隆会滑回到其原始位置，然后再转到我拖动到的位置。 此处有一个 GIF 显示了该问题。

关于如何解决这个问题有什么想法吗？

var ul = document.querySelector("ul");

function getNextElement(y) {
    var next = [...document.querySelectorAll("li")].map(element => {
        var rect = element.getBoundingClientRect();
        return {
            element: element,
            top: rect.top
        }
    }).reduce((a, b) => Math.abs(b.top - y) < Math.abs(a.top - y) ? b : a).element;
    next == null ? next = ul.firstElementChild : next;
    return next;
}

document.querySelectorAll("li").forEach(draggable => {
    draggable.draggable = true;

    draggable.ondragstart = event => ul.appendChild(document.createElement("li"));
    draggable.ondrag = event => draggable.classList.add("dragging");

    draggable.ondragend = event => {
        draggable.classList.remove("dragging")
        ul.removeChild(ul.lastElementChild)
    };

    draggable.ondragover = event => {
        event.preventDefault();
        var next = getNextElement(event.clientY);
        var dragging = document.querySelector('.dragging');
        if (dragging !== null) {
            if (next === null) {
                try {
                    ul.appendChild(dragging);
                } catch (error) {
                    console.log(dragging);
                }
            } else {
                try {
                    ul.insertBefore(dragging, next);
                } catch (error) {
                    console.log(dragging)
                }
            }
        }
    };
});

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400&display=swap');

#container {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translate(-50%, 0%);
    width: 200px;
}

ul {
    list-style: none;
    margin: 0;
    font-size: 30px;
    font-family: "Inter";
    padding-left: 0;
    line-height: 40px;
    font-size: 16px;
}

li {
    width: 200px;
    padding-left: 15px;
    user-select: none;
    overflow: hidden;
    cursor: default;
}

li:hover {
    background-color: #f6f6f6;
    border-radius: 9px;
}

.dragging {
    color: transparent;
    border: 2px dashed #ddd;
    height: 36px;
    border-radius: 9px;
    background-color: white !important;
}

<div id="container">
    <ul>
        <li>Item 1</li>
        <li>Item 2</li>
        <li>Item 3</li>
        <li>Item 4</li>
    </ul>
</div>