iOS 8 iTunes sync problem

Same problem with my iPhone 4S. I made a fully reset a couple of times, but nothing changed.

Yep, exact same thing happened to me. I have synched my Iphone 6 128gb many times without issue, and adding new playlists/tracks. Then suddenly yesterday it got hung up on the synch step "waiting for changes to be applied" and all but about 15% of my music was gone from my phone. The playlists were showing up but they were empty. Reset the phone, restart macbook, no change. After multiple attempts, I was finally able (don't remember how) to re-synch my music to my phone, however, now I have 40gb of music & 40gb of "other" using storage. It's as if there is a ghost copy of my entire synched library stored in Other, with no way to delete it because it doesn't show up under "Usage" in Settings. Which really *****, b/c now I only have 19gb of free space on my phone when i should have about 50gb.

I am reading that many people are having multiple issues with synching music so this is a common problem. It is very annoying, i'm glad I was able to get my music back on the phone, but i'm afraid to plug it in again as it might delete the music again, or put even more into Other. And I can no longer edit what music and playlists I have on my phone. This is a basic function of itunes that is now failing. What has happened to Apple quality control?

Any luck with this issue? I'm having the same thing happen. 90Gb of "other." I tried restoring the phone several times but it just keeps happening.

I'm having the same issue but with my pictures, one time I sync my iphone 6 plus 128 gig phone and I have 50 gig of "other" and 5 gig of pictures and then the "other" goes higher when I try to add more pictures until I get to the point I'm at now where I can't add anything more because while it is syncing, iTunes shows that I 40 gig of pictures and 50 gig of "other" and it won't sync anything else, I seen on another thread with an older iphone from 2008 that they had the same problem and they said to restart the phone as a "new" iphone so I think I am going to try that but I'm kind of afraid to do that because the last 2 times I've tried restoring my phone, I've had problems where I was really afraid that it wouldn't even restore and turn back on. Any help would be greatly appreciated. Incidentally, I believe that when I first got my new phone after waiting 2 or 3 months, I set it up with my back up from my old iphone 5 and then kept adding pictures and it seemed to work but then one day it just seemed to start growing on the "other" when I tried adding pictures and then I restored it and that's when it really went weird with making most of memory being used by the "other" instead of the pictures.