From my perspective...this 100% normal. Four motors turning at about 5000 rpm creates its own wind...plus gps is trying to maintain location, of which without supplemental waypoint it will wonder somewhat. from my limited experience this looks fine. Here is a link that explains gps accuracy...GPS accuracy not ‘nearly perfect’
Enjoy the new toy!!
That's fine, at low altitude as it is, the Mavic uses its downward positioning sensors/camera to maintain its position. The accuracy and stability is reliant on amount of light and different contrast on the ground. The more light the better the more ground contrast the better.
If ground is all one colour like white concrete then mavic will not be so stable or on all green grass with no patches amongst it. It needs patterns. So expect a few centermeters of shift/movement if over bad non abstract surface.