v-for中嵌套el-popover导弹出框中的按钮点击取消确定无效，没有办法关闭弹框？

Question

 <div class="" v-for="(item,index) in 50" :key="index">
                <el-popover placement="top-start" title="标题" width="200" trigger="hover" v-model="visible[index]">
                    <div class="total-center-block" slot="reference">{{item}}--</div>
                    <div>
                        <p>{{item}}"这是一段内容,这是一段内容,这是一段内容,这是一段内容。"</p>
                        <div style="text-align: right; margin: 0">
                            <el-button size="mini" type="text" @click="cancel(index)">取消</el-button>
                            <el-button type="primary" size="mini" @click="confirm(index)">确定</el-button>
                        </div>

                    </div>

                </el-popover>

    </div>