The Nissan Connect is, and always has been, shockingly bad - so bad that I wouldn't trust the information it returns and I certainly wouldn't expect Nissan to take app privacy/security seriously given that they can't be bothered to fix problems that have been known about since at least when I bought a Leaf two years ago.
I agree with other posters - the car itself is great, the app is appalling rubbish that should never have been allowed to escape from the lab.