I have a samsung galaxy s8 with android 9. Sometimes I don't hear the notification when I get a message. I've already checked my notif settings. It just doesn't work sometimes. My only hypothesis is that it doesn't play the sound when the messages app is already open, even after the screen dims. I'm missing texts because I can't hear replies. Is there any way to make the notif sound play 100% all the time regardless of the status of my phone? (excluding DND)