Element: [Bug Report] Select Component popup animation exception in Chrome 74

[justyeh]

Element UI version

2.8.2

OS/Browsers version

win7/chrome74

Vue version

2.6.10

Reproduction Link

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

Steps to reproduce

click the select

What is Expected?

正常的弹出动画

What is actually happening?

这个是我在开发时发现的，包括官网也能复现；

表现：下拉框弹出时会反复跳动两次

[element-bot]

Translation of this issue:

Element UI version

2.8.2

OS/Browsers version

Win7/chrome74

Vue version

2.6.10

Reproduction Link

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

Steps to reproduce

Click the select

What is Expected?

Normal pop-up animation

What is actually happening?

This is what I found in the development, including the official website can be reproduced;

Performance: The drop-down box bounces twice when it pops up
[! GIF.gif] (https://i.loli.net/2019/05/09/5cd3e7d0f1ded.gif)

[LebronLei]

i have the same question

[yangyalu]

I have the same question

[yangyalu]

How to solve it?

[ChenErik]

it's maybe chrome bug?

[island205]

Duplicate of #15501