While using maps.me (which incorporates OpenStreetMap data), route suggestions do not go along Rue De Terres Basses throug this intersection. At least while using the walking routes, the map indicates a much longer route around this intersection.
The three lines at this intersection seem to share a point, so I'm not sure what the issue is. Maybe this has already been fixed but maps.me hasn't yet updated their data? Or maybe there's another issue either at maps.me or OpenStreetMaps?

Il y a aussi un ferry St Louis Iles Saintes. Compagnie : Comatrile