same issue. it was working for a year then lately keeps saying it's on do not disturb when i try and drop in to other room. i look on the app it says do not disturb is off (swear i set it to schedule but that's gone) if it turn it on and off by app it doesn't work?!? But if i go to other room and tell it to turn do not disturb off by voice (not app) it works for a day?!?