To filter on Product Fields, we advice you to use ‘contains’ as a filter_operator. The reason is that the product name and the price are stored together in the database, seperated by a pipe symbol.
Eg. a field has a product name ‘Produkt A’ with a price of ‘$10’. This is stored as ‘Produkt A|$10’. You have to enter the precise value to get the correct results.
With ‘contains’ you have the option to only enter (a part of) the product name, or the price as a value.
[gravitywp_count formid='1' filter_field='2' filter_operator='contains' filter_value='Produkt A|$10']