Almost all GPS will route to the nearest road.  Occasionally the nearest residential road is not the route to the house, especially if the driveway is missing.  The reason I'm confused is the driveway was mapped years ago.

I did confirm it's connected to the roads, and connected it to the building, and moved the address into the building.

I also added to allow delivery access to the driveway.

This hopefully will resolve it, but it could take a few months to be picked up.  

Also please keep in mind OSM is not used by everybody.  For instance I don't think Uber uses it, but Lyft does.