When a-menu-item is placed in an external file, the mouse hover displays multiple highlights

[lvlingjie]

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

Version

2.0.1

Environment

系统：macOS11.0.1，浏览器：chrome89.0.4389.90，vue：^3.x

Reproduction link

Steps to reproduce

具体请看连接

What is expected?

和官方demo一样正常显示

What is actually happening?

hover的时候同级全部高亮，点击二级菜单的时候，同级所有二级菜单都会展开

[John60676]

Reference #3032

[github-actions]

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