Hi,
You have removed building=yes from https://www.openstreetmap.org/way/149535834, therefore this is no longer rendered as a building.
https://www.openstreetmap.org/way/1150216711 also seems to be a building, but you have tagged it leisure=horse_riding.
These buildings don't need the tag leisure=horse_riding because they belong to https://www.openstreetmap.org/way/186525070 (Écurie Mustesch), compare
https://wiki.openstreetmap.org/wiki/FR:Tag:leisure=horse_riding