except for some reason on my phone my "downloaded" albums seem to remove themselves if I haven't listed to them in a while. Discovered this on a recent flight.

except for some reason on my phone my "downloaded" albums seem to remove themselves if I haven't listed to them in a while. Discovered this on a recent flight. Airline didn't offer in-flight wifi. Tried to listed to an album which I'd downloaded but taken out of my regular rotation, and it just wasn't there.