New Ring 4 this week; the app works fine for my own iphone SE and I rcv notifications and doorbell chimes to phone. My wife is a shared user with iPhone 10 and she rcvs notification alerts for motion (although somewhat delayed), but no ring at all for the doorbell. I've looked at all her notification and app settings and can't figure it out. She doesn't use iPhone's FOCUS mode; iOs is current, nothing obvious in the app settings. Ideas?