I have a 100% legitimate, human operated reddit account and I am constantly shadow banned by default on subreddits (i.e. my comment shows for me logged in, but

I have a 100% legitimate, human operated reddit account and I am constantly shadow banned by default on subreddits (i.e. my comment shows for me logged in, but is hidden when viewed in private window). I am sure it's not based entirely on karma, but karma and account age are definitely large factors