Many are the examples by which Apple has made a firm bet to leave iTunes at the level of excellence it deserves. We have from version 12.4: a reordering of many of its icons, making those that we use more frequently larger, as well as the almost general demand for the return of the side bar. Possibly Apple plans to make up for lost time with version 12.4 that we can download it since last May. If yesterday we commented on improvements in the Apple Music service integrated into iTunes, today we commented on the latest improvement introduced in version 12.4.3.
It seems that some users had reported problems with the playlists. The error occurred when we made a modification of the playlists on the iPhone, iPod or iPad, and it did not carry over to our iTunes playlists. The update is available in the App Store, as we show you: 
It is not the first time that Apple has problems with synchronization between devices, although we have seen a constant improvement especially from the most recent versions: Mac OS X ElCapitan e IOS 9
This third update of version 12.4. in a short time, it indicates that the guys from Cupertino are focused on implementing the application. As we saw in the article published about updating iTunes to version 12.4.2 . In that update fixed an issue with playing songs less than a minute long.
If there is no new setback, this should be the latest iTunes 12 update. Those of us who regularly use this application are eager to see the final version of iTunes 13 which is expected to be presented just with macOS Sierra the last week of September or first weeks of October. We expect a renewal of the application practically from scratch, not only a face wash on an aesthetic level, but also improvements in its internal functioning.
Here I go, to see if it lets me recover some lost songs