I am having a problem with my local files playing on the Android Spotify app. I have tried uninstalling and reinstalling the app but it doesn't seem to work, all the other music downloads but not my local files that have been added to that playlist. 

It used to work, but sometimes spotify does this "oops, you don't have any songs downloaded and we need to download them all again" screw ups and now they don't download.

When i scroll down to them in the playlist they are grey (with no grey downloading icon, just purely greyed out) and when I press on them it says "this song is not available". 

My phone and my desktop are on the same home internet and I don't know what the problem is but it's really frustrating. The songs I have in local files are ones not available on spotify.