Before you removed the bump on edits, title, category, and tag changes only bumped the topic when it had no replies. Otherwise, no bump happened because it wasn’t the last post. Do you plan to restore that, or do you want to block these bumps too?
I also wondered why a category edit on my test topic didn’t bump the topic now. I have the impression it’s because of the editing grace period. After waiting for 5 minutes, editing the category bumped the topic again.
I am still confused about what causes a bump now, apart from a reply. Understanding that could help me find solutions for how I notice edits where the user followed the Discourse instructions to edit their post instead of posting consecutive replies[1]. I think it might be a frustrating experience when the system tells you to edit your post instead of replying, you do that, and no one notices. I also asked for help on how edits on wikis can be tracked now.
Happy birthday 
“No more than %{count} consecutive replies are allowed. Please edit your previous reply, or wait for someone to reply to you.” ↩︎