Version
1.6.5
Environment
windows 10
Reproduction link

Steps to reproduce
- 在treeNode数据中使用自定义插槽 scopedSlots ,并将其定义为{title: 'customTilte'}
- 在tree-select中添加 名为 customTiltle的插槽
What is expected?
正常渲染customTiltle的结果
What is actually happening?
组件报错,$scopedSlots.title is not a function