[Bug Report] cascader lazyload bug
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- Dominant language
- Vue
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- 54k
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Description
### Element UI version
2.15.7
### OS/Browsers version
Windows 10 专业版
### Vue version
2.6.14
### Reproduction Link
https://codepen.io/gongmingcai/pen/xxPPqEg
### Steps to reproduce
click radio of cascader panel
### What is Expected?
should not expand child cascader panel
### What is actually happening?
expand child cascader panel and show '暂无数据'
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Assessment
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