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One can say that this turn restriction should be mapped in OSM, but there are many other similar places in the data that implicitly should have turn restrictions.
Organic Maps, Graphopper and Valhalla fail here: https://www.openstreetmap.org/directions?engine=fossgis_valhalla_car&route=47.51607%2C8.76452%3B47.51305%2C8.76492#map=17/47.51437/8.76382
OSRM works fine.
One can say that this turn restriction should be mapped in OSM, but there are many other similar places in the data that implicitly should have turn restrictions.
Mapbox implies it for its routing, we need to apply these heuristics too: https://web.archive.org/web/20221202052513/https://labs.mapbox.com/mapping/mapping-for-navigation/implicit-restrictions/