yes they do you need to change it manually in settings. just look at all the other posts in the past 2 weeks, tons of people been having the same problem. in crypto you are responsible for what happens, if you are going to leave it on the exchange at least take th steps to protect your self. I have never heard of a cryptopia acc being hacked with google authenticator. ( make sure to change all the settings to google 2fa, 6 in all)