Hi Thierry,
Reference the 'fix me' tag on https://www.openstreetmap.org/way/1186980998. I rode my bicycle on this path 4 times over the last two weeks, recording my GPS track with a Garmin Edge 1040 (multi-GNSS receiver). The path geometry as drawn by you is accurate with my tracks. Should we remove the 'fix me' tag?
Cheers, Andy (der B)