I was getting a lot of lag on my phone playing pokemon go then I looked and soundcloud was "checking downloads." First I turned on wifi only downloading, but it kept checking, so I turned off automatic downloads and about 20gb of my downloaded collection was deleted. I thought I might've accidentally clicked the delete downloads button because my phone was lagging so bad, but sure enough I test downloaded something, disabled automatic again, and it was deleted. When you disable auotmatic downloads it specifically says "Existing downloads will still be available offline."
So what's the deal? Is this a known bug? Is there a way for me to prioritize what I want to download first (now that i have a ton of stuff to download again) if I've ever enabled automatic downloads?