Hi,
You have removed the tag building=yes from https://www.openstreetmap.org/way/122965012. Therefore this building will no longer be rendered as a building an the maps.
Also the tag leisure=horse_riding is not for buildings but for complete riding centers. I would recommend to map the riding center with an additional object (node or area). Compare
https://wiki.openstreetmap.org/wiki/DE:Tag:leisure%3Dhorse_riding
https://www.openstreetmap.org/way/290985555
https://www.openstreetmap.org/node/2332110783