KDE - FolderView shows list on panel instead of Icon


with todays update to Tumbleweed 20180618, I received an update to KDE Plasma Version 5.13.0 and KDE Frameworks Version 5.46.0

I do have a “FolderView” widget referencing the desktop folder on the main panel.
It used to be shown as a simple icon within the panel, extending to a list when clicked on.

Since the update, a list of the folder’s content is shown. I believe it to be a bug. All the icons take up so much space in the panel.
No configuration option seems to let me setup FolderView to showing only the icon when living on a panel.

I wonder if that is openSuse specific or a general KDE bug.

Any help is very much appreciated.


Update: This looks like this bug: