最近、未読メッセージの青い数字が(本来表示されないはずの時に)表示されるのはなぜですか?

Fair enough.
I don’t know how it works, so forgive me if my thinking is off. In my mind, I was imagining you could do something server-side when deletions occurs: Correct somehow the counts for all users to account for the deletions. I get that it doesn’t make sense to check each time if there was maybe deleted posts on the “front page”, especially as deletions are rather the exception (new posts are the rule).

「いいね!」 1