[Bug Report] select create entries arrow click problem

[ac88]

Element UI version

2.3.7

OS/Browsers version

windows 7

Vue version

2.5.17-beta.0

Reproduction Link

https://jsfiddle.net/w4wem3s7/1/

Steps to reproduce

左边 select 点击展开下拉选择框后 ，关闭，点击右侧小箭头，需要点2次才展开

右边 加了样式修复的，重复上面操作，只需点1次小箭头就可展开

What is Expected?

创建条目模式和其他select一样展开后，点小箭头可以直接关闭

What is actually happening?

展开后点击小箭头关闭开启都不顺畅

[element-bot]

Translation of this issue:

Element UI version
2.3.7

OS/Browsers version
Windows 7

Vue version
2.5.17-beta.0

Reproduction Link
https://jsfiddle.net/w4wem3s7/1/

Steps to reproduce
On the left select, click open the drop-down selection box, close it, click the right arrow, and you need to do it 2 times.

The right side adds the style repair, repeats the above operation, only needs 1 times the small arrow to be allowed to expand.
What is Expected?

After creating the entry mode as well as other select, the small arrow can be turned off directly.
What is actually happening?

After unfolding, clicking on the small arrow and closing the open is not smooth