Hi,
Please do not retag buildings as riding centres as you have done here:
https://www.openstreetmap.org/way/400191590/history
https://www.openstreetmap.org/way/400191631/history

Buildings always need a building=* tag, otherwise they will not be displayed as buildings on the maps. 
Indoor arenas can be tagged building=riding_hall, horse stables can be tagged building=stable and so on, see OSM wiki.