htv:headers not conveyed when exposing thing

[kiesel]

When exposing a thing with http bindings, the htv:headers are emptied / not transported to the thing description of the exposed thing.

As an example, this is an excerpt of the td before exposing it:

  "properties": {
    "counter": {
      "type": "integer",
      "writeOnly": false,
      "readOnly": false,
      "forms": [
        {
          "htv:headers": [
            {
              "htv:fieldName": "Cache-Control",
              "htv:fieldValue": "max-age=0"
            }
          ]
        }
      ]
    },

After exposing, a href is there, but htv:headers has disappeared.

I believe it should be possible to provide values here.