Avoid expand sub-menu

Hello
I would like to know if is it possible to avoid to expand the sub-menu of the explorer ?
See on: https://i.imgur.com/T3em1KZ.png
When I click on [03.Script], I've all the submenu that expand and I think that is not necessary.
I want to expand only the submenu that I Click.

WHen I clic on [03.Script] I want only to have the 3 sub
01-AutoHotKey
02-Autoit
03-Python

Then When I clic on one on this submenu, I want that is the only one to expand.

How can I can do that ?

Reproduce the explorer behavior shown in the linked screenshot, starting from the theme's explorer or submenu entry point. Confirm that expanding 03.Script shows only its three direct children, and that expanding one child does not expand sibling submenus; the issue is open with no comments or named files to guide further investigation.

Written by the indexing model from the issue text.