[Bug]: federated Shares do not sync (always?)

[ferdiga]

⚠️ 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

federated Shares do not sync (always?) and Desktop client reports problems of closed stream.

Steps to reproduce

1. create a federated share
2. enable nextcloud desktop sync
3. enable syncing for the federated share
   ...

Expected behavior

changes in the federated share should be synced to the source federation instance.

workaround - unselect the federated share for syncing (and use directory from the source instance if possible)
...

Which files are affected by this bug

files in Shares

Operating system

macOS

Which version of the operating system you are running.

Sequoia 15.2

Package

Official Linux AppImage

Nextcloud Server version

29.0.9

Nextcloud Desktop Client version

3.14

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

Updated from a minor version (ex. 3.4.2 to 3.4.4)

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

Additional info

No response