test:

src/jensen.js

@@ -697,6 +697,8 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
     if (typeof length != 'number') throw new Error('parameter `length` required');
     if (length <= 0) throw new Error('parameter `length` must greater than zero');
 
+    Logger.info('jensen', 'getFile',`file download start. filename: ${filename}, length: ${length} `);
+
     let fname = [];
     for (let i = 0; i < filename.length; i++) fname.push(filename.charCodeAt(i));
 
@@ -726,6 +728,8 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
         audio && audio.pause() && audio.remove();
     }
 
+    visibilitychange();
+
     document.addEventListener('visibilitychange', visibilitychange);
 
     let flen = 0;