WrapUpCode always null in analytics detail query

trying to pull conversation details but wrapUpCode is always null. i’m using GET /api/v2/analytics/conversations/details/query with a standard JSON body. the response returns data for duration and status but the wrap up code field is empty. is this a known limitation or am i missing a filter? here’s the payload i’m sending: { “dateFrom”: “2023-10-01T00:00:00.000Z”, “groupBy”: [“wrapUpCode”], “select”: [“wrapUpCode”] }