Creating an in/exclusion rule incorrectly creates a "equals" test against an array

[zenweasel]

Creating a rule like this:

Should create a rule where "equals" is tested against "EMS", instead it is testing against an array ( ["EMS"] ) causing the inclusion test to fail and the discount not to be applied. Still not sure why we have "is" testing against multiple values but nevertheless it doesn't currently work with a single value creating a rule like this:

  inclusionRules: {
    "conditions": {
      "all": [
        {
          "fact": "item",
          "path": "$.productVendor",
          "value": [
            "EMS"
          ],
          "operator": "equal"
        }
      ]
    }