Head movement in backswing

Hello, new to the school.

Looking for some advice on the swing. I can keep my relationship to the ball in regards to my shoulder plane and torso every swing but my head always moves down a couple of inches. I am getting great success at the range since starting the course and feel confident and hitting them sweet most of the time, rarely laser straight but good connection and miles better than old swing. Should I be concerned the head always moves down a bit no matter how hard I try to keep steady?

Thanks

Allan