At this location (-66.6709085,-55.1190628), there is an offset of 4km between the OSM boundary and IGN WMS of Argentina and it is suggested to align OSM data according to IGN data.

https://www.openstreetmap.org/way/363531474

Link to the IGN: https://www.ign.gob.ar/NuestrasActividades/InformacionGeoespacial/ServiciosOGC