I've been having the same problem with my iPhone 5c running IOS 9.2.1
I just auto filled music on yesterday and already songs are gone but I don't have problems with this on my Amazon kindle fire so obviously this must only an apple problem
I am having the same issue. I have a 128Gb iPhone 6S. IOS 9.3.1. I do not buy music from iTunes. I have all my music on a hard drive, and itunes is set not to sync. Ever. I do not use Apple Music, did not sign up and only set the phone to show music on the phone.
Yet twice now my phone has deleted the whole of the music library on the phone (almost 10,000 songs) whilst I was not connected to iTunes.
Does anyone have any idea why this is happening and what to do about it.
This is with iOS 8.1?I opened my music app today and all my non purchased music was gone. I don't use apple music, I don't use match. This happens every few months. Hopefully ios 10 fixes this because it's ****ing annoying.