[Bug Report] Tabs component cannot locate the current label

[Zypom]

Element UI version

2.10.1

OS/Browsers version

MacOS High Sierra10.13.4/谷歌浏览器 75.0.3770.100（正式版本） （64 位）

Vue version

2.6.10

Reproduction Link

https://codepen.io/zypom/pen/QXPWoZ?&editable=true

Steps to reproduce

当label过多被折叠时，并且tab-position值为left，点击最后一个标签，当前label定位被跳转，

What is Expected?

不发生跳转

What is actually happening?

发生跳转

[element-bot]

Translation of this issue:

Element UI version

2.10.1

OS/Browsers version

MacOS High Sierra 10.13.4/Google Browser 75.0.3770.100 (official version) (64 bits)

Vue version

2.6.10

Reproduction Link

Https://codepen.io/zypom/pen/QXPWoZ?&editable=true

Steps to reproduce

Click on the last tab and the current label location is jumped

What is Expected?

No jump occurs

What is actually happening?

A jump occurred

[SnuggleE]

i meet the problem，too