I also use uBlock but my filters are the default ones and I saw it without any problem but tbh this is the first time that I saw some post on the Web have HN as a share option or the first time that I was surprised seeing it. Maybe it has something to do with Google ranking "trusted human information and knowledge" higher than "non-human" information and knowledge[0] or simply some Meta software engineer loves and uses HN so s/he decided to include HN as well, idk.
