It became a problem when the second generation voice skills were released back in April of 2020. And has been a problem ever since. You can find lots and lots of discussion of it in the forum, but that’s the bottom line. You could no longer individually authorize specific devices to the voice assistants.
A lot of people still say “new app“ when they mean the 2018 V3 app. That’s the one that replaced the 2015 classic app.
Just this month the 2021 app was released but only for android. People with iOS are still using the 2018 app.