Transfer order work break by license plate issue

hoping someone can advise, we have multiple license plates of the same product in the same location. there is no conversion on these products to Pallet, they are simply stocked in KG. When we release a transfer pick for these items it will not break by license plate, despite us having the work header set to break by LP. It calls for the full quantity of the product in the location (total of all the lps) - how can we get around this?