[Bug]: Leave Share in subfolder of share deletes folder in remote share

[kuhnchris]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

"Leave Share" on a subfolder of a shared folder causes deletion of said subfolder for everyone - basically, leaving a share causes deletion of a folder in someone else's share folder - i.e. "remote file deletion"

Steps to reproduce

1. Create folder on Nextcloud
2. Create multiple subfolders (and files) within that 1st folder (i.e. level 2 and below)
3. Share that first folder with a person
4. The person syncs the top folder and all subfolders via desktop app
5. The person enters the top folder and has a list of the subfolders in explorer
6. With the Nextcloud Desktop integration, the person rightclicks on a subfolder and selects "Leave share"
7. The folder and all it's content is deleted (moved to files_trashbin on the server)

Expected behavior

The selected folder will not be synced anymore as one or more subfolder of the shared folder aren't "relevant" and don't need to have data synchronized

Which files are affected by this bug

All folders and files within the folder that "Leave share" was executed on

Operating system

Windows

Which version of the operating system you are running.

Win 10

Package

Official Windows MSI

Nextcloud Server version

30.0.2

Nextcloud Desktop Client version

3.14.1

Is this bug present after an update or on a fresh install?

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

N/A

Additional info

Potentially similar to #7281, but I'm not sure if a "groupfolder" is the same as a "share".