I go make an edit to a really old post of mine and suddenly it is bumped to the top of the category page. This is 100% unnecessary and I don’t want it to look like I edited it to bump it on purpose. I can’t reproduce this on Discourse because by default you aren’t allowed to edit your post after a certain timeframe. And I don’t even know if the “editing bumps topics” feature is a plugin or is indeed default Discourse behavior. I also see tons of topics in #help-and-feedback that are many months old and are at the top because someone edited their post. So I think it is best to request this here.
Also if you have notification settings for a category set to “Watching First Post” you get notification when a new topic is created. But if the topic gets edited it notifies you again of that topic.