[Bug]: Flow "File deleted" + "File system tag" is not being triggered

⚠️ 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

This is a follow-up to the issue #34052 which was closed without any resolution with a suggestion that if the problem is still present in the current version (which it is) a new issue is supposed to be opened. The original issue contains in my opinion a valuable debug info so please see its description as well.

To reiterate the problem: When a flow is created with a condition "File delete" and an additional "when" condition is set to "File system tag" - "is tagged with" - "TAG", upon deletion of a matching file the flow would not be triggered. Example of a flow setup:

Steps to reproduce

1. Create a new flow, e.g. for "Run script".
2. Set "When" condition to "File deleted".
3. Add an additional "and" condition.
4. In the first drop-down, select "File system tag".
5. In the second drop-down, select "is tagged with".
6. In the third drop-down, select a a tag.
7. In action, use for example just echo test.
8. Tag a file with the tag set in step 6.
9. Delete the file.
10. Go to the logs section, set the log level to "info" and observe whether the workflow would start.

Expected behavior

• A log message "All qualified flow configurations are going to run Run script" should appear.
• A log message "executing sh -c 'echo test' >/dev/null &" should appear.

Nextcloud Server version

29

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Nginx

Database engine version

MariaDB

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

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

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

Configuration report

{
    "system": {
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "29.0.10.1",
        "overwrite.cli.url": "https:\/\/***REMOVED SENSITIVE VALUE***",
        "overwriteprotocol": "https",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_sendmailmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpsecure": "tls",
        "mail_smtpauth": 1,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "loglevel": 0,
        "maintenance": false,
        "trashbin_retention_obligation": "auto,60",
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [
            "admin"
        ],
        "theme": "",
        "default_phone_region": "MT",
        "enable_previews": true,
        "enabledPreviewProviders": [
            "OC\\Preview\\Movie",
            "OC\\Preview\\PNG",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\MP3",
            "OC\\Preview\\MP4",
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\PDF"
        ],
        "preview_max_x": "800",
        "preview_max_y": "600",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "versions_retention_obligation": "auto,60",
        "log_rotate_size": "0",
        "maintenance_window_start": 7,
        "preview_libreoffice_path": "libreoffice",
        "filesystem_check_changes": "1",
        "preview_office_cl_parameters": " --headless --convert-to pdf --outdir "
    }
}

List of activated Apps

Enabled:
  - admin_audit: 1.19.0
  - calendar: 4.7.16
  - cloud_federation_api: 1.12.0
  - comments: 1.19.0
  - contacts: 6.0.1
  - dav: 1.30.1
  - federatedfilesharing: 1.19.0
  - files: 2.1.1
  - files_downloadlimit: 2.0.0
  - files_pdfviewer: 2.10.0
  - files_reminders: 1.2.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - files_versions: 1.22.0
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - notifications: 2.17.0
  - oauth2: 1.17.1
  - password_policy: 1.19.0
  - photos: 2.5.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - related_resources: 1.4.0
  - serverinfo: 1.19.0
  - settings: 1.12.0
  - systemtags: 1.19.0
  - tasks: 0.16.1
  - text: 3.10.1
  - theming: 2.4.0
  - twofactor_backupcodes: 1.18.0
  - twofactor_totp: 11.0.0-dev
  - updatenotification: 1.19.1
  - viewer: 2.3.0
  - workflow_pdf_converter: 1.14.1
  - workflow_script: 1.14.1
  - workflowengine: 2.11.0
Disabled:
  - activity: 2.21.1 (installed 2.13.3)
  - bruteforcesettings: 2.9.0 (installed 2.4.0)
  - circles: 29.0.0-dev (installed 22.1.1)
  - contactsinteraction: 1.10.0 (installed 1.1.0)
  - dashboard: 7.9.0 (installed 7.0.0)
  - encryption: 2.17.0
  - federation: 1.19.0 (installed 1.10.1)
  - files_external: 1.21.0
  - firstrunwizard: 2.18.0 (installed 2.9.0)
  - nextcloud_announcements: 1.18.0 (installed 1.9.0)
  - recommendations: 2.1.0 (installed 0.8.0)
  - sharebymail: 1.19.0 (installed 1.10.0)
  - support: 1.12.0 (installed 1.3.0)
  - survey_client: 1.17.0 (installed 1.8.0)
  - suspicious_login: 7.0.0
  - user_ldap: 1.20.0
  - user_status: 1.9.0 (installed 1.0.1)
  - weather_status: 1.9.0 (installed 1.0.0)
  - workflow_media_converter: 1.11.7 (installed 1.11.7)

Nextcloud Signing status

Technical information
=====================
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix
them.

Results
=======
- workflow_pdf_script
	- EXCEPTION
		- Exception
		- App not found
- workflow_pdf_converter
	- INVALID_HASH
		- lib/BackgroundJobs/Convert.php

Raw output
==========
Array
(
    [workflow_pdf_script] => Array
        (
            [EXCEPTION] => Array
                (
                    [class] => Exception
                    [message] => App not found
                )
        )

    [workflow_pdf_converter] => Array
        (
            [INVALID_HASH] => Array
                (
                    [lib/BackgroundJobs/Convert.php] => Array
                        (
                            [expected] => 37fc0a9c44237d3103c5fc9d81fafa01f5c4bed48a66a0b6d1819cde74f619956c995a38e5a501f56b5aca5f1f38406f601f839589ad7c56a0cd7d7a98fd4a3d
                            [current] => 8d282277a73804d63960121ffeeff8ba66912c71a1270db95c7befc3154075d4a0eb9edda12867c352dcf3ea529badc2940aa4bcfdc8ce5b4586aa2f4522e070
                        )
                )
        )
)

Nextcloud Logs

Additional info

No response

Start by reproducing the flow using the workflowengine, systemtags, and workflow_script apps, following the listed deletion and tagging steps and checking the log section at info level. Compare the behavior with issue #34052 and consider the work complete when the expected qualification and command-execution log messages appear for a tagged deleted file.