Voice isolation doesn't work on iOS 16

Hello,

Is it just me or does anyone else experiencing voice isolation not working when using Facetime since iOS 16 was released? It worked fine for me with iOS 15 on my previous iPhone 11 Pro. Ever since I upgraded to iPhone 14 ProMax with iOS 16, every time I Facetime my friends and using voice isolation mode, they keep telling me they can't hear me because my voice is muffled but when I put mic mode back to standard, they could hear me fine.

I wonder if this is an iOS 16 bug but if there is a fix out there, please help me out. Thanks!