Supreme Act Of War (Ex-VotN) (@VisionsOfTheNight)

Does anyone know how to solve this? I get no audio notifications of incoming texts I'm not in Do Not Disturb and my volume is all the way up. It will pop up on the screen and I do get a flashing light, but no noise. I've checked notification settings and app settings and found nothing. This has been happening ever since I installed it a couple days ago. Calls come in fine though. I also have an issue with Line app only giving notifications when the app is open. Any help is appreciated.