ios – My loop makes a click on noise every time it begins

The loop performs easily in audacity however once I run it within the machine or simulator it clicks every loop at completely different intensities.

Im utilizing .flac format as a result of it is the one one not including a bit of silence at the beginning/finish of every file like mp3 or m4a and isn’t heavy like wav.

I config the session at App stage:

//Audio
        let audioSession = AVAudioSession.sharedInstance()
        do {
            attempt audioSession.setCategory(.playback, mode: .default, choices: [.mixWithOthers])
            attempt audioSession.setActive(true)
        } catch {
            print("Setting class session for AVAudioSession Failed")
        }

After which I made my technique on my class:

    //PlaySound
func playSound(soundId: Int) {
    let sound = ModelData.shared.sounds[soundId]
    
    if let bundle = Bundle.predominant.path(forResource: sound.filename, ofType: "flac") {
               let backgroundMusic = NSURL(fileURLWithPath: bundle)
               do {
                   audioPlayer = attempt AVAudioPlayer(contentsOf:backgroundMusic as URL)
                   audioPlayer?.prepareToPlay()
                   audioPlayer?.numberOfLoops = -1 // for infinite occasions
                   audioPlayer?.play()
                   isPlayingSounds = true
               } catch {
                   print(error)
               }
    }
}

Does anybody have any clue?