Fix self.info["idx"] always is -1
Fix self.info["idx"] always is -1

allen7wang/musicbox,AnyOfYou/musicbox,Ma233/musicbox,caitinggui/musicbox,chaserhkj/musicbox,kigawas/musicbox,darknessomi/musicbox,Catofes/musicbox,miuc/musicbox,kigawas/musicbox