Hi
Osmi finds an error here
https://tools.geofabrik.de/osmi/?view=areas&lon=152.65821&lat=-26.18406&zoom=19
It is an invalid multipolygon, try using building part method instead or use simple polygons instead of a multipolygon.
There many links regarding multipolygon relations on the wiki… here is one

https://wiki.openstreetmap.org/wiki/Relation:multipolygon

https://wiki.openstreetmap.org/wiki/Key:building:part
 
…also I think building=hospital is sufficient without adding the yes option too.