catalogProductReturnEntity.additional_attributes bug when an attribute can have more than one value
Using magento v2 Soap API - WS-I compliance is OFF.
Client is built with .NET
I am unable to retrieve attributes such as e.g. category_id, because the additional_attributes field is an array of associativeEntity objects. An associativeEntity can only hold one value. For the attribute category_id the value returned is the literal string "Array" instead of an actual array of category id's that a product is assigned to.
How do I obtain the correct values for mult-value attributes such as category_id?