I have an enumerator typed for Content, and on displaying the result of this enumerator in a search (normal or Solr), I get the label [object Object] instead of a link (or at least the title) of the content.

I get this in JSON:

"etapePorteuse": {
    "label": "[K543NBUB] L2 Math\u00e9matiques",
    "value": {
        "isSimple": false,
        "id": "container://9ec55e9c-0a5c-473d-b3a3-b1762bc441c6",
        "title": "L2 Math\u00e9matiques"
    }
}

Where a String enumerator result is like this:

"catalog": {
    "label": "Catalogue 2013-2017",
    "value": "2013-2017"
},

You can test with the field etapePorteuse of courses in the ODF environment.