Touching inner rings are a violation of the OGV OGC "Simple Features" specification and therefore some programs that process OSM data might have a problem with that, and discard the polygon that has touching inner rings. The standard OSM rendering process that is based on an osm2pgsql import of OSM data into a PostGIS database has no problems with touching inner rings. You can switch off the "touching inner rings" layer in OSMI if you want.

Touching inner rings are a violation of the OGV "Simple Features" specification and therefore some programs that process OSM data might have a problem with that, and discard the polygon that has touching inner rings. The standard OSM rendering process that is based on an osm2pgsql import of OSM data into a PostGIS database has no problems with touching inner rings. You can switch off the "touching inner rings" layer in OSMI if you want.