Hi Diagro1982,
those ways are not part of the official cycle trail network in the Bavarian Forest National Park. As cycling in the national park is only allowed on marked cycle paths and official roads, biking is not allowed here. I changed the tags back to bicycle=no (https://www.openstreetmap.org/changeset/154649176). The tour you linked had some mistakes in the track, I already contacted the author to change it.
The same applies to the changesets https://www.openstreetmap.org/changeset/154366450 and https://www.openstreetmap.org/changeset/154580408