Fix audio player

Issue #645

src/services/audio.service.js

@@ -1,5 +1,6 @@
 import utils from "../plugins/utils";
 import emitter from 'tiny-emitter/instance';
+import { reactive } from "vue";
 
 /**
  * This plugin (available in all vue components as $audioPlayer) handles
@@ -41,6 +42,7 @@ export default {
           entry["currentTime"] = 0;
           entry["playPercent"] = 0;
           entry["playing"] = false;
+          entry = reactive(entry);
           this.infoMap.set(eventId, entry);
 
           // Get duration information