Repeatedly disconnected from Spotify

I have a Spotify premium account (linked to my Facebook account) that I’ve been able to link to djay for iPhone. However, after using Automix Radio for a while (or not–it appears to be time-dependent), djay stops being able to make Spotify API calls (it keeps attempting to load new tracks) and the only fix is to try to manually adding a track (which prompts me to log back into Spotify).