Commerce Search Refinement doesn't work with picklist fields

[LukaszSzczygielski]

Hi,
I am implementing commerce search using Connect API
Rest Connect API
Apex Connect API
Unfortunately I cannot filter search results by picklist field value.
B2B Commerce on Lightning Doc states that picklist type is supported.

This is a sample of my code:

`

     CommerceSearchDomain.SearchProductsWrapper searchProductsWrapper = new CommerceSearchDomain.SearchProductsWrapper();

    searchProductsWrapper.webstoreId = input.webstoreId;

    searchProductsWrapper.productSearchInput = new ConnectApi.ProductSearchInput();

    searchProductsWrapper.productSearchInput.pageSize = APP_CommerceCatalogAPI.DEFAULT_SEARCH_PRODUCTS_SIZE;

    searchProductsWrapper.productSearchInput.page = input.pageNumber;

    searchProductsWrapper.productSearchInput.searchTerm = input.searchTerm;

    ConnectApi.DistinctValueRefinementInput refinementInput = new ConnectApi.DistinctValueRefinementInput();

    refinementInput.values = new List<String>{'HE'};

    refinementInput.nameOrId = 'Orders_3__c';

    refinementInput.type = ConnectApi.CommerceSearchFacetType.DistinctValue;

    refinementInput.attributeType = ConnectApi.CommerceSearchAttributeType.Custom;

    searchProductsWrapper.productSearchInput.refinements = new List<ConnectApi.RefinementInput>{refinementInput};

`

Picklist field values:

Running SOQL as B2B user returns Product records with correct value in specified field.
But commerce search returns an empty response whenever I try to specify value in Refinement. For empty refinements list it returns every record (accessible by user).

I tried to check other fields and using Checkbox field gives proper results from the Webstore Search.

Before using fields as search filters I configure commerce setup and rebuild search index

Any ideas what is missing in my code or configuration? Anyone had this issue before?

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