message: reset encodingId when detaching because if not media will be paused if attached to a different track with same encodingId
diff: @@ -37,6 +37,8 @@ class Transponder
  this.track = null;
  //Stop listening
  this.transponder.SetIncoming(null,null);
  + //No encoding
  + this.encodingId = null;
  };
  //Create event emitter
  @@ -102,6 +104,8 @@ class Transponder
  } else {
  //Stop listening
  this.transponder.SetIncoming(null,null);
  + //No encoding
  + this.encodingId = null;
  }
  }
  