Hi,
https://www.openstreetmap.org/way/1332714359 looks like a riding arena and should be tagged leisure=pitch + sport=equestran + surface=sand instead of leisure=horse_riding + natural=sand. We already had a discussion about a similar case last year: https://www.openstreetmap.org/changeset/142388689
In JOSM you can use the preset for sport=equestrian to tag riding arenas.