Custom field restricted to Brand not working

-- HikaShop version -- : 5.1.5
-- Joomla version -- : 5.2.5
-- PHP version -- : 8.1.28

Hi,
I created a custom field and in the restriction section > Category, I have selected a Brand.
Now if I add a new product, and I select that brand to allow me to select a value for that custom field, the field is not visible in administrator.
The restriction section is not working with brands, it is working only with categories?