@user_5359 thank you so much for noticing. The honest answer here is that this line should never have been created. It's identical in shape to way 1433701339 from the same changeset but in the wrong location. It's a copy-paste gone wrong in JOSM, and I have deleted the line now. Sorry for the confusion! https://www.openstreetmap.org/way/1433701339/history/1