I notice that the camera's focus point always jumps back to the center of the frame (screen) after a seconds, even when I move it elsewhere away from the center. This behavior is odd and I have never seen it on other phone brands. And as some others have noted, camera focusing in general just doesn't seem that snappy compared to many other brands. Please improve the camera app!
Please pay attention to this issue. I did not notice this kind of problem when I use third party app.