Group not recognized if located under two level deep groupfolder node

When a group definition node (hipposys:group) is located under two level groupfolder nodes (hipposys:groupfolder), then the group node doesn't become effective. So, as a result, login failed if a user is included in that specific group.

This works in 10.1.x, but not working in 10.2.0. So, it's a regression.

Test Case

1. Create a 10.2.0 project using archetype.
2. Build/run CMS.
3. Try to login by author/author. You can log in by default.
4. Now, create a group folder at /hippo:configuration/hippo:groups/groupfolder1 and move the author group node to /hippo:configuration/hippo:groups/groupfolder1. groupfolder1 is type of hipposys:groupfolder. Save. Try to login by author/author in CMS UI again. You can still log in successfully.
5. Now, create another group folder in a deeper level at /hippo:configuration/hippo:groups/groupfolder1/groupfolder2. groupfolder2 is type of hipposys:groupfolder, too. And move author group node into the groupfolder1/groupfolder2 node, resulting in /hippo:configuration/hippo:groups/groupfolder1/groupfolder2/author. Save. Try to login by author/author again in CMS UI. Now, you cannot login.
6. The Login UI shows error: "Access to this application is not allowed for this user."