[Bug]: Deleting multiple big folders results in possibly missing folders from trash bin

⚠️ This issue respects the following points: ⚠️

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

Bug description

Deleting at the same time multiple big folders (with many files inside) may result in missing folders in trashbin.

Steps to reproduce

1. Create folder1, folder2 and folder3
2. Add 10 000 files inside each folder (for i in {1..10000}; do touch test${i}.txt; done)
3. Delete the 3 folders
4. Check what is in the trashbin

Expected behavior

folder1, folder2 and folder3 visible in trashbin

Installation method

None

Nextcloud Server version

27

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MariaDB

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

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

Start by reproducing the issue with three folders containing 10,000 files each, using the shell loop described in the report, then inspect the trashbin after concurrent deletion. The fix is complete when folder1, folder2, and folder3 all remain visible in the trashbin; the issue does not name a source file or test to begin with.