Hi,

Good for you living there on Ischia, BUT, with your 3rd edit now the Southern Italy boundary is  being highlight as a black boundary on the OSMI areas view indicating that now there's something wrong!

https://tools.geofabrik.de/osmi/?view=areas&lon=16.39820&lat=40.80409&zoom=8&baselayer=Geofabrik%20Standard&opacity=0.50&overlays=duplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways%2Cduplicate_node%2Csingle_node_in_way%2Cduplicate_segment%2Cway_in_multiple_rings%2Cintersection%2Cintersecting_segments%2Cring_not_closed%2Ctouching_rings%2Crole_should_be_inner%2Crole_should_be_outer%2Cinner_with_same_tags%2Cways

This shows you're the last one:
https://www.openstreetmap.org/relation/17514288

Please fix (think the 2 little island you added need to have as coastline added and to be inserted into the SI relation as well else they remain under water. A sample you'll find near to the left close to the breakwater https://www.openstreetmap.org/way/288290270

If you break a sweat and need help, we're here.

(Big OSM brother is watching you ;o))))

Thanks

PS locale=ru? You gave more information than you may have wanted too.