I have a lot of playlists, so many of them are in folders, e.g. a folder called "Genre" containing playlists like "Hip-Hop", "Country" and so on. Some of these Folders have more than three playlists.
Now the problem: If I open these folders in my head-unit, I can only select the first 3 in a folder. Scrolling is not possible (it is possible on other screens, just not in playlist folders). If I use Android Auto directly on my phone, it seems to work.