Hi,
https://www.openstreetmap.org/way/1180974463 looks like a riding arena (similar to https://www.openstreetmap.org/way/709817408), but you have tagged it as a riding centre (leisure=horse_riding). 

Here an example for a riding centre which contains a riding arena: https://www.openstreetmap.org/way/786324169

Wiki:  https://wiki.openstreetmap.org/wiki/Tag%3Aleisure%3Dhorse_riding

Similar case: https://www.openstreetmap.org/way/707110220

In JOSM you can use the preset "Equestrian Sport" to tag riding arenas.