It looks like BlackBerry is trying to adopt some features to make iOS users feel a bit more at home on BlackBerry OS 10.3. I was digging through the features and found that under the hub there is the option to turn on the screen for new notifications. Hardcore BlackBerry users are used to the notification lights for new messages but iOS users are accustomed to the screen turning on and showing you the notification.
Right now turning on this feature works more often than not but it is not foolproof. It seems like BlackBerry has some kinks to iron out but its interesting to see them trying to add these popular iOS usability traits that have shown up on some Android phones too.