So, if you’re on a Discourse page, and an admin creates a new subcategory, the category lists from your own page updates itself via ajax, which is good.
It works well when a category is created, but there’s a bug if it’s a subcategory.
Here’s what the category selector displays when the admin create a subcategory test on the category Autour d’une roue:
As it is a subcategory, it should not be displayed among the parent categories. Plus, if you click on it, it leads to a 404.
You have to actually reload the page for the category list to be properly updated.