Translate api not working for a deny policy

I am testing the translate api for 2 simple cases:

1. Add two simple partition search policy rego files:

search1.rego:

package osdu.partition["osdu"].search1

default allow = false

allow = true {
    input.operation == "view"
    input.record.acl.viewers[_]==input.groups[_]
}

search2.rego (call it a deny policy):

package osdu.partition["osdu"].search2

default allow = false
default deny = false

deny = true {
    input.operation == "view"
    input.record.acl.viewers[_]==input.groups[_]
}

allow = true {
    deny == false
}

2. Call translate api for the following input file against policy 'search1':

search_input1.json:

{
   "query": "data.osdu.partition[\"osdu\"].search1.allow == true",
   "input": {
      "operation": "view",
      "groups": [
         "data.default.owners@osdu.example.com",
         "data.default.viewers@osdu.example.com"
      ]
   },
   "unknowns": [
      "input.record"
   ]
}

The translate api returns the good ES subquery:

{
  "query": {
    "bool": {
      "should": [
        {
          "bool": {
            "filter": [
              {
                "terms": {
                  "acl.viewers": [
                    "data.default.owners@osdu.example.com",
                    "data.default.viewers@osdu.example.com"
                  ]
                }
              }
            ]
          }
        }
      ]
    }
  }
}

3. Call translate api for the following input file (same as in step 2) against policy 'search2':

search_input2.json:

{
   "query": "data.osdu.partition[\"osdu\"].search2.allow == true",
   "input": {
      "operation": "view",
      "groups": [
         "data.default.owners@osdu.example.com",
         "data.default.viewers@osdu.example.com"
      ]
   },
   "unknowns": [
      "input.record"
   ]
}

The translate api returns the error msg:

{"detail":"An error occurred when talking translate service. 'data'"}

We are expecting it to return a query like:

{
  "query": {
    "bool": {
      "must_not": [
        {
          "bool": {
            "should": [
              {
                "bool": {
                  "filter": [
                    {
                      "terms": {
                        "acl.viewers": [
                          "data.default.owners@osdu.example.com",
                          "data.default.viewers@osdu.example.com"
                        ]
                      }
                    }
                  ]
                }
              }
            ]
          }
        }
      ]
    }
  }
}

The current translate api seems not working against a deny policy.