Folders Hierarchy

Nextcloud version (eg, 12.0.2) : 15.0.2
Apache or nginx version (eg, Apache 2.4.25) : Apache
PHP version (eg, 7.1) :

The issue you are facing:

We have installed NC 15.0.2. We are facing the issue in folders hierarchy. IT seems like if a folder has sub folders and we give access to someone on root folder, it doesn’t allow the user to have all rights on child folders.

Is this a bug to be fixed or are we missing something on folders access permission?

Your response will be highly appreciated. TIA