My mic stops working once I "leave" the app

my problem started recently, about a week ago. Once I call somone, my mic works fine on the call page and in the app. But once I leave to another tab or close my phone, my mic completely stops working. My permissions for my phone are all on so it's not that, unless it's a software problem (I'm on an Samsung Galaxy A32 5g). This has never happened to me before and I'm not sure what's causing the problem 😅. Please help