I also subconsciously switch my voice around certain people. I can do a really good fem voice when I’m at home in my room, but as soon as I know others are listening it immediately becomes more masculine. I’m getting better at doing it around my family, but anytime I’m in public my masc voice comes out and it is so frustrating and dysphoric. I never understood why I did it, but subconsciously trying to hide that I’m trans makes sense, although I look very fem now so my masc voice really isn’t helping me.