vue elementUI slot-scope無效使用

以下代碼是elementUI組件中tree的一段代碼，可是右邊的append和remove操作消失，在一些電腦上有，在一些電腦上沒有，請(qǐng)問這是配置的問題還是什么原因？請(qǐng)好心人幫忙解答一下，十分感謝！

<template>
<div class="custom-tree-container">

<div class="block">
    <p>使用 scoped slot</p>
    <el-tree
            :data="data5"
            show-checkbox
            node-key="id"
            default-expand-all
            :expand-on-click-node="false">
        <span class="custom-tree-node" slot-scope="{ node, data }">
            <span>{{ data.label }}</span>
            <span>
              <el-button
                      type="text"
                      size="mini"
                      @click="() => append(data)">
                Append
              </el-button>
              <el-button
                      type="text"
                      size="mini"
                      @click="() => remove(node, data)">
                Delete
              </el-button>
            </span>
        </span>
    </el-tree>
</div>

</div>
</template>
<script>

let id = 1000;

export default {
    data() {
        const data = [{
            id: 1,
            label: '一級(jí) 1',
            children: [{
                id: 4,
                label: '二級(jí) 1-1',
                children: [{
                    id: 9,
                    label: '三級(jí) 1-1-1'
                }, {
                    id: 10,
                    label: '三級(jí) 1-1-2'
                }]
            }]
        }, {
            id: 2,
            label: '一級(jí) 2',
            children: [{
                id: 5,
                label: '二級(jí) 2-1'
            }, {
                id: 6,
                label: '二級(jí) 2-2'
            }]
        }, {
            id: 3,
            label: '一級(jí) 3',
            children: [{
                id: 7,
                label: '二級(jí) 3-1'
            }, {
                id: 8,
                label: '二級(jí) 3-2'
            }]
        }];
        return {
            data4: JSON.parse(JSON.stringify(data)),
            data5: JSON.parse(JSON.stringify(data))
        }
    },

    methods: {
        append(data) {
            const newChild = { id: id++, label: 'testtest', children: [] };
            if (!data.children) {
                this.$set(data, 'children', []);
            }
            data.children.push(newChild);
        },

        remove(node, data) {
            const parent = node.parent;
            const children = parent.data.children || parent.data;
            const index = children.findIndex(d => d.id === data.id);
            children.splice(index, 1);
        },


    }
};