Hi,
You have removed the tag building=yes from https://www.openstreetmap.org/way/854870314; therefore this area is no longer rendered as a building on the map.
If this building is a riding hall / indoor arena you can use the tag https://wiki.openstreetmap.org/wiki/FR:Tag:building=riding_hall instead of building=yes.
The tag https://wiki.openstreetmap.org/wiki/FR:Tag:leisure=horse_riding is not really appropriate for a riding hall, it is for the whole riding centre like here:
https://www.openstreetmap.org/way/285568173