text: I don't see a surface tag added on the referenced way https://osm.org/way/27738836
  There is only a tracktype tag and the changeset you referred to even only changed the geometry and not any tags ( https://www.openstreetmap.org/way/27738836/history/5 ).
  
  So the question still is: Which surface tag should this way have according to the linked photo in the first post of this note?