[Bug Report] Cascader lazy load make checked mess
Open
component: cascader
type: bug
- Dominant language
- Vue
- Stars
- 54k
- Forks
- 14.4k
- PR merge metrics
- No merged PRs in 30d
Description
### Element UI version
2.15.2
### OS/Browsers version
windows 10 / Chrome 90.0.4430.93
### Vue version
2.6.14
### Reproduction Link
https://codepen.io/duncan248/pen/rNybEgZ
### Steps to reproduce
expand v1 option, v1 will be removed from v(same to v2)
(checkStrictly: true, multiple: true)
### What is Expected?
After expanding, v will not change
['v1', 'v2'] => ['v1', 'v2']
### What is actually happening?
['v1', 'v2'] => ['v2']
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Assessment
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