Sorry I’m late to the party. So after rooting through meta.discourse, I think the difference in notifications that @seanblue is noticing might stem from the fact that Discourse seems to handle wiki’ed posts differently depending on whether or not they’re the OP in the thread. Unfortunately, I’m having trouble finding specifics.
Thanks! For some extra data points, I did get notifications for edits made on the following two posts. Like the post above that I didn’t get a notification for, these were created by me and are the first post in the topic. The only difference is that these two topics I’m tracking or watching, whereas the other one is marked as normal.