Menu Drop down submenu child alignment issue.

I have verified the patch #2 and tested it on Drupal version 9.5.x and Mili Theme 9.1.0. The patch not working fine. second child is not aligned properly for their respective parent.
In my screenshot 'Menu Three' is the actual child of 'Procedures' menu, but after the patch it looks like 'Menu Three' will be the child of 'Team'. So i recommend some custom css below,

Try below code,

ul.main-menu ul.submenu li.main-menu-item.expanded ul.submenu {
    top: 0;
}

I have added the before and after screenshots for reference.

@alok_singh & @Harish1688 thanks for creating the patch.
I have tested both patches #2 & #4.
Patch #2 was applied successfully & #4 showed an error while applying the patch.
Showing errors like:-

<stdin>:78: trailing whitespace.
error: patch failed: CSS/style.css:262
error: css/style.css: patch does not apply

@Harish1688 please look into it.
Sharing screenshots of the result of both patches.
Thanks.

Thank you all for reporting the issue and helping me to fix this issue.
This has been fixed in version 10.1.1