So i got an Iphone 6S with the latest software and all. But I can't get Do Not Disturb mode to work with Whatsapp. I have it so only my favorites can call and send messages. And it worked with whatsapp before. But now, the screen doesn't light up when I get a text from Whatsapp, and that person is in my favorites. It works perfectly fine with calls, just not text messages. Anyone who can help?