[Bug Report] Cascader cascade selector version 2.9.2 has problems and 2.8.2 performance is inconsistent

[Zeus-Iqd]

Element UI version

2.9.2

OS/Browsers version

macos

Vue version

2.6.10

Reproduction Link

https://codepen.io/anon/pen/EBLOzY

Steps to reproduce

选择普通业务，他会定位到第一个的数据。而2.8.2表现正常

What is Expected?

恢复2.8.2的正常表现

What is actually happening?

选择普通业务，他会定位到第一个的数据

[element-bot]

Translation of this issue:

Element UI version

2.9.2

OS/Browsers version

MacOS

Vue version

2.6.10

Reproduction Link

Https://codepen.io/anon/pen/EBLOzY

Steps to reproduce

Choosing a common business, he will be able to locate the first data. 2.8.2 was normal.

What is Expected?

Recovery of normal performance of 2.8.2

What is actually happening?

Choosing a common business, he will be positioned for the first data.

[island205]

Duplicate of #16377