Im having this issue as well since this V3 update.
Ive enabled Wakelock/keep service, removed pause on headset disconnect, turned off crossfade, Turned off visualization, Battery saver is turned off completely. tried to follow every bit of advice here and in other posts, but nothing is working. Some times it will last as long as 4 songs before it stops, sometimes it lasts 4 albums. But eventually it will stop playing for no real reason. Its doing my head in.
Android 5.1.1
Agora 4g Pro