I set "AI & Tech Hype" as a filter, this includes "agi" in the blocked keywords. The issue is that AGI is also Agenzia Italia, a news source for the Italy category.
AGI is a major news provider for Italian news so sometimes almost all the news get filtered even if they are not related to Artificial General Intelligence.
Screenshot attached with the filtered news:

Screenshot with the closed news:

I expect that tags would filter only related content, not sources.