Please Fix - Almost Perfect!

There is only one problem preventing me from rating this app 5 stars. I installed it a few weeks ago and it was great. I had to replace my iPhone and I installed it a second time. This time I have to manually stop the audio every time I hit the next button after each prayer. I suppose the audio feature is nice for those who want to use it, but I prefer to pray quietly. Putting my phone on mute doesnt stop it, and turning the volume all the way down doesnt change the volume the audio on the app one bit. Thats seems a little odd... and a bit spooky! Is this a problem with my "new" refurbished iPhone? Please help fix this.

dxtwo about Family Rosary's Mobile Rosary