Playcount not updating
I only listen music through my iPhone. For my playlist management I have to rely on my iTunes (e.g. playlists based on playcount). I try to sync my iPhone at least once a week with iTunes. Normally everyting works fine, but seemingly randomly iTunes refuses to update the playcount (like it doesn't know it has played any songs at all).
Does anyone know what causes this issue and how to fix it?
I have the most recent iOS on my iPhone 5S & the most recent iTunes-version.
iPhone 5s, iOS 9.1, null