楼主解决了吗，我遇到相同的问题。安卓不能循环播放，以及大概率不能播放（进去响了一声就停止了），ios正常，也能循环播放，代码如下：

const backgroundAudioManager = wx.getBackgroundAudioManager()
    backgroundAudioManager.title = 'Hope';
    backgroundAudioManager.epname = 'Hope';
    backgroundAudioManager.singer = 'Luke Barker/Anders Baldwin/Brady Hoffman/Ruby Terry';
    backgroundAudioManager.coverImg = 'cloud://lac-fgwl5.6c61-lac-fgwl5-1301744280/Hope.jpg';
    // 设置了 src 之后会自动播放
    backgroundAudioManager.src = 'cloud://lac-fgwl5.6c61-lac-fgwl5-1301744280/Hope.mp3';
    backgroundAudioManager.play();



    backgroundAudioManager.onError(function(res) {
      console.log('backgroundAudioManager.onError', res);
      backgroundAudioManager.stop();
          backgroundAudioManager.title = 'Hope';
    backgroundAudioManager.epname = 'Hope';
    backgroundAudioManager.singer = 'Luke Barker/Anders Baldwin/Brady Hoffman/Ruby Terry';
    backgroundAudioManager.coverImg = 'cloud://lac-fgwl5.6c61-lac-fgwl5-1301744280/Hope.jpg';
    // 设置了 src 之后会自动播放
    backgroundAudioManager.src = 'cloud://lac-fgwl5.6c61-lac-fgwl5-1301744280/Hope.mp3';
          backgroundAudioManager.play();
  });


    backgroundAudioManager.onPlay(() => {
          console.log("音乐播放开始");
      })
    backgroundAudioManager.onEnded(() => {
          //backgroundAudioManager.stop();
          backgroundAudioManager.src = 'cloud://lac-fgwl5.6c61-lac-fgwl5-1301744280/Hope.mp3';
          backgroundAudioManager.play();
          console.log("音乐播放结束");
      })


      backgroundAudioManager.onStop(() => {
        //backgroundAudioManager.stop();
        backgroundAudioManager.src = 'cloud://lac-fgwl5.6c61-lac-fgwl5-1301744280/Hope.mp3';
        backgroundAudioManager.play();
        console.log("音乐播放结束");
    })

麻烦提供出现问题的具体机型、微信版本号、系统版本号，以及能复现问题的代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）