imessage notifications not working
My husband's phone is having issues with imessage notifications. It will not notify him of new imessages. It appears as if all imessages are marked as read and he doesn't know they are new until he goes into the message app and opens a conversation. Messages are appearing, just not notifying. This problem is solved if I send him the message as a text however. Then it works as it should. We have both looked online and tried troubleshooting ourselves. We have turned Bluetooth off, reset network settings, checked do not disturb, checked the notification and sound settings, done all software updates, reset the phone and nothing works. Phone is a 7 plus. Please help!
iPhone 7 Plus