According to https://wiki.openstreetmap.org/wiki/Notes and the community habit obersved by me, the notes feature is not intended as "note to self" but "note to all contributers". Hence, it's not intended I do close a note just because I myself do not process it because I am not at location thus I can't process it – the note is intended to stay open and inform other contributers that are on location what needs to be done, so after someone added the terrace, the note shall be closed :-)