I expected that when I open the old link, it would redirect me to the new location, but that doesn’t happen. When I open it anonymous, I shows “Page not found”. When I open it with my account, it shows me the old closed/deleted post.
We use a soft-delete system in Discourse, so admins are able to go back and see deleted topics, including the ability to restore them. The result: admins can see a deleted topic, everyone else sees a “page not found”.
There is a way to setup a redirect, manually, by visiting /admin/customize/permalinks and adding a redirect from the topic path to a topic ID:
Nothing comes to mind on why the permalink would operate that way… let’s see. Did you move the topic t/devcon-bogota-pbs-developer-roundtable-summary/633 into a category that is not public?