[Bug Report]select 多选框 开启多选后 修改v-model后数据清空

[Arech-github]

Environment

最新chrome

Reproduction link

https://run.iviewui.com/QHHdO891

Steps to reproduce

直接点击button按钮即可

What is expected?

保留一个数据

What is actually happening?

一个数据也没保留