Boundary_char not working as expected ES 2.3.4

I m using ES 2.3.4 and would like to highlight sentence cantaining matching words bordered by "." character, pratically the whole sentence. I know it was impossible with previouis versions. Is it possible now?

GET /_search
{
"query": {
"bool" : {
"should" : [
{ "term" : { "wo-patent-document.description_IT" : "ruota" } },
{ "term" : { "wo-patent-document.description_IT" : "auto" } }
],
"minimum_should_match" : 1
}
},
"highlight" : {
"type": "fvh",
"boundary_max_scan": 0,
"boundary_char": ".",
"order" : "score",
"fields" : {
"wo-patent-document.description_IT" : {}
}

}

}

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