Hi,
You have tagged all the riding arenas
https://www.openstreetmap.org/way/1446880045
https://www.openstreetmap.org/way/1446880052
https://www.openstreetmap.org/way/1446880053
https://www.openstreetmap.org/way/1446880054
as riding centres (with leisure=horse_riding). This is wrong, riding arenas are usually tagged with leisure=pitch + sport=equestrian (like https://www.openstreetmap.org/way/604400757).

See wiki:
https://wiki.openstreetmap.org/wiki/How_to_map_a#Riding_centre_(equestrian)
https://www.openstreetmap.org/way/467019449#map=17/45.581548/9.167323&layers=P (example)