note 8 live focus

there are 2 main conditions to take live focus photos, enough light(in your case it's alright) and distance of around 1.2 meters(try with this).

Thanks for being with Samsung and sharing your concern. We would like to inform you that please follow the steps below:-
1) Navigate to Camera >> Settings >> Reset Camera
2) Navigate to apps >> Settings >> Applications >> tap on three dots right on top >> Reset app preferences.
3) Navigate to Settings >> Apps >> Camera >> Clear Data & Clear Cache and restart the device.
Be sure to hit ♡ when you find an answer that works for you.

still doesnt work. has happened after the latest update. camera version is 7.5.56. please update regarding the issue. everyone is clueless. and have come across a few people with similar issue