The intersection was replaced with a roundabout.

Two sections (admin_level=9) are overlapping: 85046A (Habay-la-Neuve): https://www.openstreetmap.org/relation/11652040
and 85046F (Anlier): https://www.openstreetmap.org/relation/11652039

Not sure if this is normal.

The admin_level 9 section of Villers-sur-Semois is spread over two communes (Habay and Étalle). Shouldn't it be only in Étalle?

rue des Riches and rue des Pauvres: I couldn't find any reference to those names outside OpenStreetMap.

Survey path here

Around there a street becomes one way after 20 metres, but can't figure which one and it's not the one with the bike exemption.

Verify if one of the Perl bikes goes here (I have a picture of the bike sign below the hiking route, but relations on OSM don't share the same way)

Spotted a cycling route to Eisenach which does not exist on OSM.

Spotted a cycling route sign (directions to Minden and Steinheim)