The Earth's shadow cone is located at a fixed location along the Ecliptic plane, opposite the sun.  This means that, depending on the fixed direction of the Earth's shadow cone in the sky, the Moon may overlap the umbral region, or pass through it.  The projected path of the moon's orbit in the sky is affected by parallax, which in turn controls the view of the Earth's fixed shadow overlapping the moon during the lunar eclipse from different observation points on Earth.