Enable FastVectorHighlighter to Work on MultiPhraseQuery

FastVectorHighlighter will not highlight on MultiPhraseQuery - will instead just skip and return results.

Example:
I have synonyms.txt file and it contains
break,breaks,broke,brake

If I search for "brake vehicle", the query parses to MultiPhraseQuery with brake vehicle, break vehicle, breaks vehicle, broke vehicle as possible matches. Would like highlighting to occur on all of those results. Currently there are no highlighting results at all.