The object counter on the left sidebar doesn't increase/decrease if you add/delete objects.
They do however when the page is reloaded.
Same problem in the following situations:
You import or a type or create a type without a category and the left sidebar updates itself cause you have an uncategorized type.If you update the type and add a category the sidebar doesn’t update.
If you import objects the counter doesn’t increase unless you reload the page
It looks like it works.