I'm not getting imeesage notifications. This does not happen alot so thats why i am so confused. But enough for me to notice. I dont get the notifications of messages, they come through as if it has already been read. I have tried reset

This does not happen a lot so that's why i am so confused. But enough for me to notice and its progressively getting worse. Ill sit and wonder why this person hasnt text back and look at the message and it came in 45min ago. No notifications at all, it doesnt even have the blue dot by the messages. I dont get the notifications of messages, they come through as if it has already been read. I have tried reset the phone, reset the notifications.