Ringer/volume issue

I enjoy the app works well in a pinch. The main issue I have with it is that sounds can not be played with the phone being set to vibrate. I know everyone will say just turn ringer on but I did that and low and behold at the same time I was using the doe bleat a phone call came in and botched a shot at a doe. Would be great if there was a fix.

12hunt about Deer Calls Pro