Currently on stable, it’s possible this doesn’t exist on tests-passed (but in that case ideally the next stable release should be sure to fix this):
As you can see, we have the parent category set to filter out subcategory posts in its list of topics - however, when a subcategory topic is updated, the user is still prompted to reload.
The setting to filter out subcategory posts should also, ideally, prevent updates to subcategory topics from prompting the user to reload. There’s not only no point but it is in fact actively confusing to the user, who is prompted to reload only to be greeted by nothing.