I keep seeing old questions on the homepage that don't seem to have any recent activity on them. Like this one for instance, which was on the home page and claims to have been last active today, but nothing has been edited or commented since 2018. What, exactly, is the activity that brought this question to the home page?
It's not just this one either--I've seen dozens if not hundreds of cases of this over the past few months. And they don't have the message "bumped to the home page by community" that they get when they automatically get bumped up, so it doesn't seem to be an automatic thing. Unless they removed that message? If so, that's a bit confusing.
Putting the "bug" tag on this because the tag description says it's for "erroneous or unexpected behavior", and I'd call this unexpected. I hope that's not the wrong tag to use.