多层抽屉弹出的时候，底层抽屉移动的时候没有遮罩底层抽屉下面的页面数据

[imic07]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.4.11

Environment

win10/chrome latest/vue 2.6

Reproduction link

https://www.antdv.com/components/drawer-cn/#api

Steps to reproduce

点击多层抽屉demo的Two-level drawer按钮，可以看到最底层的页面，不能平滑的显示。体验很不好

What is expected?

平滑展示，打开多层抽屉时候，不会看到上层抽屉的父对象页面

What is actually happening?

页面没有平滑展示

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.