Hi there, Jon! I’ve just gotten a fix for this merged in (FIX: only show edit history when navigating via edit notification for posts which have revisions and can have its edit history viewed by tyb-talks · Pull Request #26418 · discourse/discourse · GitHub). The issue is that topic publishing removes all previous revisions done to that post but the existing behaviour of that type of notification is to also show the post history modal. This fails when there’s no revisions to be found.
In this scenario, what’s expected is for a click on that notification to bring you to the topic without opening the history modal. Please pull in the latest discourse to your instance and let me know if it works for you 