[Bug Report] Cascader 级联选择器 动态加载功能bug

[z-sq]

Element UI version

2.15.14

OS/Browsers version

windows 11 / edge(119.0.2151.58)

Vue version

2.6.14

Reproduction Link

https://codepen.io/z-sq/pen/dyaJpPW

Steps to reproduce

<template>
    <el-cascader v-model="cascaderValue" :props="props" placeholder="请选择地址" />
</template>
<script>
export default {
  data() {
    return {
      cascaderValue: [1,1,1],
      props: {
        lazy: true,
        lazyLoad(node, resolve) {
          const { level } = node;
          if (level == 0) {
            resolve([
              {
                value: 1,
                label: `北京`,
                leaf: false
              }
            ]);
          }else if (level == 1) {
            resolve([
              {
                value: 1,
                label: `北京`,
                leaf: false
              }
            ]);
          }else if (level == 2) {
            resolve([
              {
                value: 1,
                label: `东城`,
                leaf: true
              }
            ]);
          }
        }
      }
    }
  }
}

What is Expected?

Cascader 级联选择器使用动态加载功能，级联数据的一二三级value一样，在回显时，选择的数据可以正常展示 北京/北京/东城区，id为【1,1,1】

What is actually happening?

无法正常回显，再二级选项出现了4个一样的北京选项