Hi,
I think you have choosen the wrong tag for https://www.openstreetmap.org/way/1293437307. This area does not look like a riding centre (tag leisure=horse_riding), it looks like a riding arena, similar to https://www.openstreetmap.org/way/621483354. In OSM riding arenas are usually tagged leisure=pitch + sport=equestrian and iD has a preset for them. See also https://wiki.openstreetmap.org/wiki/Tag%3Aleisure=horse_riding