Spotify keeps logging me out and deleting all my downloaded songs on my iPod.

[carloshdfc]

Spotify Username

carloshdfc

Plan

Premium

Country

 Brazil

Device

iPod 5

Operating System

iOS 9.3.5

My Question or Issue

I keep being logged out of my iPod every couple of days. I connect to internet on it every single day and some days when I open it, the app logs out and deletes all my downloaded songs. And it usually happens when I DON'T have internet available. My iPod is pretty much the only device I download my songs on and it's basically the reason I use Spotify Premium. I have been having this issue for about three weeks now. Can someone please help me?

Best regards,

Carlos.