After the menu component sets the getPopupContainer property, if there are children in the drop-down menu, the arrow on the right cannot be displayed

[horsecms]

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

Version

3.2.4

Environment

win10, chrome 版本 101.0.4951.54（正式版本） （64 位）, vue 3.2.25

Reproduction link

Steps to reproduce

设置后，下拉菜单中无法显示右侧箭头

What is expected?

Navigation Two ===> Submenu 后面应该有箭头

What is actually happening?

未正常显示