Music erased on my IPhone

[Thomas_lvr]

Hello everyone.

I have a problem with managing my music. I have a premium account and I listen to Spotify on iPhone; IPad and Mac.
I often listen to music in offline mode.

But then, it is at least the second time that ALL of my songs are deleted from my Iphone: Both Online that music offline. I just have my list of artists without recorded sound. By cons when using my iPad or my Mac, I have all my music, online and offline.
This is the kind of problem that irritates me, because it takes time to reconfigure everything and especially because I pay for a quality service !!

Have you ever encountered this problem?