[comp:cascader] 切换选项后，滚动条没有重新置顶

[lvzero535]

• I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

playground

Steps to reproduce

1. 两个选项的子项内容都有滚动条
2. 切换后选项后子项内容的滚动条重新置顶

What is expected?

切换后选项后子项内容的滚动条重新置顶

What is actually happening?

没有重新置顶

Environment Info

letest

[idux-bot]

Translation of this issue:

[Comp: Cascader] After switching options, the scroll bar does not reopen

• I have searched the [issues] (https://github.com/iduxfe/idux/isSues) of this repository that this is not a duplicate.

REPRODUCTION LINK

[playground](https://playground.idux.site/#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)

STEPS To Reproduce

1. The sub -items of the two options have rolled bar
2. After switching the options, the rolling bar of the sub -item content after the options reopen the top

What is exfected?

After switching the options, the rolling bar of the sub -item content is re -top

What is actually happy?

No re -top

ENVIRONMENT Info

letest