Intermittent receipt of text message notifications
I've been having intermittent issues with text message notifications for at least the past 6-12 months. The problem began with my iPhone 8 and is now continuing after upgrading to an iPhone 13 mini a few days ago.
Within the same conversation, I will randomly receive and not receive a notification. In most instances, my FitBit Charge 4 will vibrate even when the notification fails to come through my phone, but sometimes I don't even get that. It seems to be primarily with texts from my Dad (SMS), but also from my boss who is exclusively iMessage (iPhone, laptop, iPad). (Since these are the two people who text me the most, it could be systemic and I just don't realize it.) I can get 4-5 texts from either of them without receiving a notification, then the next one will prompt a notification, then it stops again. In the meantime, nothing has been changed on the phone.
My new phone is on IOS 15.3.1
iPhone 13 mini, iOS 15