[Bug Report] cascader in chrome 110% shake

[ljong1]

Element UI version

2.15.3

OS/Browsers version

win10/chrome92.0.4515.107

Steps to reproduce

Win10-1092*1080-100%

Chrome92.0.4515.107 110%(only happen in 110%)

https://element.eleme.cn/#/en-US/component/cascader#multiple-selection

Try to checked 4~8 options.(I checked 6 options.)

Result:

z-index will unlimited increase.

Sometime,cascader will shake.

What is Expected?

What is actually happening?