Hello Margoulinot, RuziziRiver is no longer on the team so I will be handling this on their behalf. Thank you for reaching out. I recognize that the oneway tagging can cause a routing issue. However, https://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway_link indicates that oneway=no should be applied to any motorway_link that is two-way. I will add that in. Thank you again and have a great day!