My SGS3 keeps deleting all songs from playlist and music lags

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http://androidforums.com – so ever since i've downloaded android 4.1. jellybeans the music has been nothing but trouble not only does it lag/stutter when i'm listening to music with screen off but my music playlist always keeps getting deleted and it's annoying as hell and it's always the same playlist that gets deleted (keep in mind it's only the music in the playlist that's getting deleted not the actual playlist) i'm using the default player. someone please help this is really getting on my nerves. (General)