Hi, are you sure these streets have the legal status of "living street"? See https://wiki.openstreetmap.org/wiki/Tag:highway=living_street If they have, the change must have been very recently. The only street in Sofia that I know with that status is Цар Иван Шишман in the centre (see the sign on the right https://maps.app.goo.gl/nZakpEs8qooY3LtLA )