Muffled Snapchat audio

I’ve been having this issue for months now and it’s the same issue a lot of other iPhone users are getting. I have an iPhone 7 and audio quality of it is amazing when playing music, recording videos within the camera app, and even using Instagram & Facebook. BUT that being said. Snapchat is the only app where it’s not picking up sound right. It’s muffled with a white noise and no matter how many times I delete and re-install the app, change my settings in the app. In the iPhone settings nothing fixes it. Can someone please tell me how I can get rid of this?