I downvote comments that strike me low-effort, trolling or as part of the "HN echo chamber", and I upvote things that seem to give rise to interesting discussio

I downvote comments that strike me low-effort, trolling or as part of the "HN echo chamber", and I upvote things that seem to give rise to interesting discussions, sometimes even regardless of their quality (which might contradict my downvoting principles). Kind of related: Did HN happen to change the way the site responds to votes recently? It seems that it was possible to see the effect of a vote immediately by reloading the page up until a couple of weeks ago. Either they have changed something (a new CDN, score blurring as on reddit), or I have somehow lost my comment voting powers. Perhaps it’s because my avgage score has dropped below 1 lately?