Author of versions only shown for admin user

[XueSheng-GIT]

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Steps to reproduce

1. Nextcloud admin is user "admin".
2. Create users "Max" and "Jarvis".
3. Create Group "GroupfolderTesting" and add Admin, Max and Jarvis to it.
4. Create a groupfolder named "GroupfolderTesting", add group "GroupfolderTesting" to it (write/share/delete, no acl).
5. Max creates a new markdown file and adds some content.
6. Jarvis edits this markdown file
7. Each user inspects his version history and activity stream of this markdown file.

Expected behaviour

Each user shall see the author of all versions of the file.

Actual behaviour

Max and Jarvis cannot see other authors.

Max:

Jarvis:

But nextcloud admin can see all authors!

Admin:

Max can see the whole activity stream ('activity_use_cached_mountpoints' => true).
Thus, it does not seem to be a permissions issue.

@artonge Not sure if this is a goupfolder issue or related to sidebar/version history in server/files?

Server configuration

Operating system: Ubuntu 22.04

Web server: Apache/2.4.52 (Ubuntu)

Database: psql (PostgreSQL) 16.4 (Ubuntu 16.4-1.pgdg22.04+2)

PHP version: PHP 8.1.2-1ubuntu2.19

Nextcloud version: 29.0.7

Group folders version: 17.0.4

Updated from an older Nextcloud/ownCloud or fresh install: Updated

Where did you install Nextcloud from: Nextcloud download page

Are you using external storage, if yes which one: no

Are you using encryption: no

Are you using an external user-backend, if yes which one: no

Client configuration

Browser: Firefox 131

Operating system: Ubuntu 24.04

Logs

Web server error log

Web server error log

n/a

Nextcloud log (data/nextcloud.log)

Nextcloud log

n/a

Browser log

Browser log

n/a

[provokateurin]

Not sure if this is a goupfolder issue or related to sidebar/version history in server/files?

Probably a Groupfolders problem and not a general problem.

[artonge]

@fenn-cs missed edge case of your feature

[solracsf]

Related to nextcloud/server#44109?