Hi, when you drag a marker it no longer has an address associated with it – it becomes just a lat/lng coordinate. So there’s no way for the plugin to know how far to zoom in or out (it doesn’t know if it’s the location of a road, a city, or a country).
However, you can still manually set a zoom level in the map editor, and it will remember that zoom and use it when you display the map.
You can also set a specific zoom in the widget.