[LayaAirIDE 2.0]部分IOS机型在加载mp3音频文件时出错，资源加载异常

重现地址：  http://192.168.1.193:8901/bin/index.html
 在Laya 2.1.0 IDE中， 游戏初始化的时候加载了图片和音频资源，加载方式如下：
var resArray: Array<any> = [
            { url: "res/atlas/Images.atlas", type: Laya.Loader.ATLAS },         
            { url: "Images/BG_Gray.png", type: Laya.Loader.IMAGE },
            { url: "Images/BG_PopWindow.png", type: Laya.Loader.IMAGE },
            { url: "Images/BG_PopWindowIn.png", type: Laya.Loader.IMAGE },
            { url: "Images/BG_PopWindowOut.png", type: Laya.Loader.IMAGE }, 
            { url: "res/Music/MouseClick.mp3", type: Laya.Loader.SOUND },
            { url: "res/Music/GameHall.mp3", type: Laya.Loader.SOUND },
            { url: "res/Music/Shoot.mp3", type: Laya.Loader.SOUND },
            { url: "res/Music/BeAttack.mp3", type: Laya.Loader.SOUND }  
        ];
        Laya.loader.load(resArray, Laya.Handler.create(this, () => { this.OnLoaded() }), null, Laya.Loader.ATLAS);
    }在IOS部分机型，如苹果8上，会出现资源加载出错，截图如附件一所示。
Load(): void {
        var resArray: Array<any> = [
            { url: "res/atlas/Images.atlas", type: Laya.Loader.ATLAS },
            { url: "Images/BG_Gray.png", type: Laya.Loader.IMAGE },
            { url: "Images/BG_PopWindow.png", type: Laya.Loader.IMAGE },
            { url: "Images/BG_PopWindowIn.png", type: Laya.Loader.IMAGE },
            { url: "Images/BG_PopWindowOut.png", type: Laya.Loader.IMAGE }, 
            // { url: "res/Music/MouseClick.mp3", type: Laya.Loader.SOUND },
            // { url: "res/Music/GameHall.mp3", type: Laya.Loader.SOUND },
            // { url: "res/Music/Shoot.mp3", type: Laya.Loader.SOUND },
            // { url: "res/Music/BeAttack.mp3", type: Laya.Loader.SOUND }
        ]; 
        Laya.loader.load(resArray, Laya.Handler.create(this, () => { this.OnLoaded() }), null, Laya.Loader.ATLAS);
    }
当我将音频资源注释掉之后，可以正常加载和显示。
 
重现demo见附件二  附件二上传不上来：https://pan.baidu.com/s/1xNcT-LaM_b0vykl_Or5O9A  见连接地址