When synchronizing libaray the newest albums are now found in two parts. The first one is known as album unknown and showing the first track only mentioning unknown artists (with showing albumcover) and not able to play. The second one shows the correct name and tracks #2 and further and is functioning in a proper manner. How can this be solved?
Hello @Mario1957,
Can you check the metadata of those tracks?
To do this, you can use the track details panel (Icon label 
after selecting a track).