G7X Mark II AF in video mode

Hi all,

I've just purchased a G7X Mark II and I have noticed something slightly weird with the auto focus whilst recording a video:

If I focus on a background and then bring an object towards the lens, the camera does not auto focus to that object. However, if I set the dial to manual mode and do the same thing (but without recording a video and having SERVO on), the focus works fine. Am I missing something? G7X Mark II AF in video mode