Gaps or unordered ways on Canberra Express route - 
See https://tools.geofabrik.de/osmi/?view=pubtrans_routes&lon=151.19704&lat=-33.89722&zoom=15&baselayer=Geofabrik%20Standard&overlays=ptv2_routes_valid%2Cptv2_routes_invalid%2Cptv2_error_ways%2Cptv2_error_nodes%2Cptv2_routes_valid%2Cptv2_routes_invalid%2Cptv2_error_ways%2Cptv2_error_nodes