This just started happening a week ago. I had 2 personalized ringtones set for 2 different contacts and they will not do anything but ring to the default setting. Worked fine for the first 6 months of ownership of my iphone7. Is this common at all , did a search and found ringtone issues from 2014 and older but I think that's a different scenario. Kind of annoying. The contact shows it set to my custom tone but does not work. Anyone else maybe know what I might try? I have not installed any new apps lately.