I use Go SMS Pro, but for some reason lately, I only get a momentary notification of new messages. I use to get an icon in the notification panel that stayed there until I read the message. My app settings are correct as are my notification settings, I believe. If I switch to the Samsung message app, the icon persists until I read the message. I downloaded and tested two other message apps and both act like GO SMS Pro with no persistent icon. My Android version is 5.0.1 (Lollipop?). I don't remember exactly when this problem showed up, but it has been fairly recently - like the last 2 or 3 months. I'm puzzled. Anyone have any ideas? I suspect it is an Android or phone issue, not an app issue.