deleted all data from iphone. next try to get a working sync over days and months.

There is few sync tweeks in upcomming build 1739

I now decided to delete all music from my iphone trough itunes.
On a clean iphone i can sync without any problems and the playlists have content.

but! often the iphone oder MM is crashing now while it is sync music. :(
after an crash, MM didn't now all the music from the iphone. :o
per example: 1200 songs on iphone, 1200 songs on iphone see in itunes, in MM there
are only 750 songs on the iphone. sync starts again. tracks are not visible in playlists :evil:

i didn't have any problems with my iphone 5 IOS 8.1.2
problems started with changing to iphone 6 IOS 8.2

I've a new iPhone6 with IOS 8.2 and when I sync my library all songs are synced correctly.
Also the playlists are synced and created on the iPhone. But most of them have no songs in the list. :(

If I add new songs to the playlist, some songs are synced to the phone and are displayed in the list.
Most of them are not shown in the list. :(

iTunes is up to date. Newest MM beta installed

Is there a solution out there?