I found a trigger that, whenever a ticket is updated and it has the discourse tag, it will notify the Discourse sync webhook through a PUT request. I wasn’t the one who set up the plugin, but could this be the culprit?
Other than that trigger, I don’t see any other automations that would be interfering. I have asked our Discoruse admins to return a list of all of John’s comments (including the ones we deleted) so I can cross-reference each instance to attempt to find a connection.