Hi ErnestoLaPomme,
this changeset has created several overlapping ways and destroyed two roundabouts:

https://tools.geofabrik.de/osmi/?view=routing&lon=-0.38748&lat=43.23225&zoom=14&baselayer=Geofabrik%20Standard&overlays=duplicated_edges

https://overpass-api.de/achavi/?changeset=145991497

I have just fixed this. If you edit routes with "osm-relatify " please do not destroy roundabouts, keep them intact to avoid this error. "osm-relatify"  is buggy.

Kind regards
Guido