Uninstalling all my songs

[Shistar]

Hi first of all I'm sorry for m'y english, i'm french and on Android, so m'y smartphone does not know english. Well i have a big problème right now. It's been since something like 2months that regulary all m'y musics, or like half of all are being unisntalled for no reasons at all of m'y Android. Maybe it's because of clean master? No I don't have it. Or a problème of espace ? I have 10go taken on 20go. So no. So if anybody has an answer? I went on spotify web site and i'm à premium member. Si I think tjat if this problem is not solved i'll just quit spotify.
So please tell me what you think about that. Have a nice week end. Peace.