RE: https://www.openstreetmap.org/way/1383807749

Please just use regular polygons for defining a fairway and a green. There is no need to break up the polygon into segments and turn it into a multipolygon. You can share the nodes between the fairway and green. Most editors, including  JOSM, will "snap" the cursor to existing nodes when you approach them. If you have any questions, please reach out and I'll gladly help.
