Music disappearing from phone ios 7

Question

Ever since updating to ios 7 (and still with 7.0.2), some of my music has been randomly disappearing from the music app. I'll select a song, then the song will then skip to the next song and onto the next and so on until it finds a song that plays. You can see the artwork of the record(s) flip many times and the song track name change. If it can't find a song, it will dump me back to the Artist list. I read a few other forums where beta testers were reportin this back in July, but couldn't find any resolution.  My only real resolution is syncing the phone with itunes, removing all the songs & podcasts, then putting the songs back.
I do have a few ideas on what is causing this. I'm big into podcasts and sync my phone with itunes many times a day to make the played/uplayed list on the podcast app on the phone and the podcast section of itunes match up perfectly. I figured to rely on my phone to look at what was played and then have the podcast in itunes be marked as played, but this doesn't happen all the time... the phone keeps the played podcasts on the phone (when it shouldn't) and doesn't put all the unplayed podcasts on the phone. I would then mark what was played on the phone and then in itunes and sync the phone again so only unplayed podcasts show on the phone and sync again. During this second sync, the "waiting for changes to be applied" shows on itunes for a long time before finally completing. I feel this would be the cause to my problem, the syncing one after the other after manually correcting. I'll see if manually maintaining my podcasts on my phone and itunes will prevent the issue, but I'm wondering if anyone else has this problem

Answer 1

I just now noticed my iphone 4s/ios7 doing the same thing.  Insanely frustrating! 
I synced last night as I had some new music I wanted on my iphone.  all of the new music is playing but anything that was previously on there is deleting itself when I try to play it. 
This is maybe the first time I've synced since the 7.0.2 update.  I guess I'll to manually remove all of the music and then add it back in to see if it works.
I've been generall disappointed with the ios7 music app and have been considering a music app called in:play as it looks to have better navigation functionality.  This may be the impetus I need to try it out.
An insight to this problem would be greatly appreciated!
Thanks!