- [ ] I have searched the [issues](https://github.com/vueComponent/ant-design-vue/issues) of this repository and believe that this is not a duplicate. ### Version 2.1.4 ### Environment vue3.x,ant-design v2.1.2和2.1.6 ### Reproduction link [https://2x.antdv.com/components/tree-cn](https://2x.antdv.com/components/tree-cn) ### Steps to reproduce 使用树组件的异步加载,添加下级数据时,treeNode.dataRef未定义 ### What is expected? 。。 ### What is actually happening? 。。 <!-- generated by issue-helper. DO NOT REMOVE -->