Joplin syncs only notebooks and entries newer than installation

I installed Joplin on Android and created some notebooks with it. It syncronizes via my Nextcloud server.
Then I installed Joplin on Windows 10 also syncronizing via Nextcloud.

The Problem I am facing is that Joplin on Windows 10 shows only the new created notebooks on Android or notebooks that have changed (name of the notebook in this case).
Also only entries newer than the installation on Windows are shown for these notebooks.

How can I change this behaviour?