- [ ] 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 2.0.1 ### Environment 2.x ### Reproduction link [https://2x.antdv.com/components/tree-cn](https://2x.antdv.com/components/tree-cn) ### Steps to reproduce 例如搜索0-0-0-1 1. 输入0-0-0展开已存在的节点 2. 继续输入0-0-0-1,所有节点折叠 ### What is expected? 期望展开0-0-0-1所在节点 ### What is actually happening? 所有节点折叠 <!-- generated by issue-helper. DO NOT REMOVE -->