Text Messages Notifcations Bug?

[thangdoan1]

So my problem is about Incoming Text Messaging notifcations.

When you go to settings -> sounds & notifications -> notifications.

Pull down Event menu, and select ....Messaging : New test message.

When I click on the box, "display message on screen."

It doesn't stay like that. I always have to change it back either when I charge my phone using my labtop or after several text messages.

I don't get it and its really annoying. Please help!