Since your image shows you in your backswing, i am going to assume, you are paused in your backswing and you have allowed the 'inner' meter, the blue area to shrink.
This blue area is your forgiveness zone. The longer you stay in your backswing the more likely this blue zone begins to shrink and reduces your 'forgiveness'.
Bring your swing back to 0 and it restores to its usual width. Hit the swing faster and it doesnt reduce at all.