I can't listen to music while using Viber, music stops

Dear All,

I just updated my iphone to ios 10.1 yesterday itself, and I'm having a lot of issues with this update

First of all, when I'm listening to music, I can't use Viber, whenever I try to send a message on Viber, the music stops.

And this is really annoying.

PLEASE PLEASE TO ANYBODY WHO HAS A SOLUTION TO FIX THIS, PLEASE TELL ME !

Before the update, my iphone was PERFECT.

KINDLY ADVICE !

THANK YOU.