AVURLAsset called API twice?

Question

I'm trying to make a request to my server through AVPlayer with additional header parameters. The server returns an .mp3 file and a record is inserted in the DB for history preview purposes. However, the DB record is doubled, with a time difference of less than 1s.

let headers: [String:String] = [
    "track_id" : "\(songid)",
    "type" : "\(songtype)",
    "user_id" : MyAccount.shared.id,
    "token" : MyAccount.shared.apiToken,
]

let item = AVPlayerItem(asset: AVURLAsset(url: MusicPlayer.url, options: [
    "AVURLAssetHTTPHeaderFieldsKey":headers
]))

// this is a queue player
player.insert(item, after: nil)
player.play()

Both iOS 9.2 and 10.3 show the same results.