there are so many streets with a restrictive access=no/forestry/agricultural and then foot=yes, bicycle=yes .... maybe it was a old tagging scheme or something. I can't remember to see any path which is only allowed for agricultural, but disallowed for foot/bicycle at the same time here in switzerland.
I updated this street to be only restricted to agricultural motor vehicles, and rest ist allowed.
https://www.openstreetmap.org/changeset/179107259

Maybe some coordinate edit would be useful?
--> But this is something to be discussed in the forum.