Good game but one complaint

I love this game a lot and I play it everyday and have a really good team now. The only complaint I have is that while Im playing the game, if someone calls me while the app is open and I hang up then the game will go mute when it comes back and the sound doesnt come back unless I close the app which gets really annoying when your doing events. I hope this gets fixed cause it gets very aggravating.

ASSASINKDOGG about DRAGON BALL Z DOKKAN BATTLE, v3.0.1