I discovered today that I now have this problem with not getting my son's request to buy app notifications on my phone. I'm on the latest official iOS 10.3.3 and the only thing that's changed is I connected my Apple Watch Series 2 to my iPhone back on June 14th otherwise everything is the same. Prior to that all notifications worked fine. He hasn't requested to buy anything from the app store for some time until now which is when I discovered the problem. Any ideas??