Suggester always highlights suggestions even if we pass highlight=false

[Nutch Solr User]

I am still experiencing https://issues.apache.org/jira/browse/SOLR-6648 issue
with solr 5.2.1. 
even if i send highlight=false solr returns me highlighted suggestions. Any
idea why this is happening?

My configurations : 

*URL :
*http://solrhost:solrpost/mycorename/suggest?suggest.dictionary=altSuggester&suggest.dictionary=mainSuggester&wt=json&suggest.q=treatm&suggest.count=20&highlight=false

*reponse : *

{
  "responseHeader": {
    "status": 0,
    "QTime": 6
  },
  "suggest": {
    "mainSuggester": {
      "treatm": {
        "numFound": 20,
        "suggestions": [
          {
            "term": "*Treatm*ent Refusal",
            "weight": 0,
            "payload": ""
          },
          {
            "term": "Withholding *Treatm*ent",
            "weight": 0,
            "payload": ""
          },
          {
            "term": "*Treatm*ent Refusal",
            "weight": 0,
            "payload": ""
          },
          {
            "term": "Withholding *Treatm*ent",
            "weight": 0,
            "payload": ""
          }
        ]
      }
    },
    "altSuggester": {
      "treatm": {
        "numFound": 2,
        "suggestions": [
          {
            "term": "*treatm*ent",
            "weight": 197,
            "payload": ""
          },
          {
            "term": "*treatm*ents",
            "weight": 5,
            "payload": ""
          }
        ]
      }
    }
  }
}


*My Configurations : *

<searchComponent name="suggest" class="solr.SuggestComponent">
   <lst name="suggester">
    <str name="name">mainSuggester</str>
    <str name="lookupImpl">AnalyzingInfixLookupFactory</str>
    <str name="dictionaryImpl">DocumentDictionaryFactory</str>
    <str name="field">keyphrases</str>
    <str name="suggestAnalyzerFieldType">text_general</str>
        <str name="indexPath">main-suggest</str>
    <str name="buildOnStartup">true</str>
  </lst>
  <lst name="suggester">
    <str name="name">altSuggester</str>
    <str name="lookupImpl">AnalyzingInfixLookupFactory</str>
    <str name="dictionaryImpl">HighFrequencyDictionaryFactory</str>
    <str name="field">text</str>
    <str name="suggestAnalyzerFieldType">text_general</str>
         <str name="indexPath">alt-suggest</str>
         <str name="allTermsRequired">false</str>
    <str name="buildOnStartup">true</str>
  </lst>
</searchComponent


 <requestHandler name="/suggest" class="solr.SearchHandler" startup="lazy">
  <lst name="defaults">
    <str name="suggest">true</str>
    <str name="suggest.count">10</str>
        <str name="suggest.dictionary">mainSuggester</str>
  </lst>
  <arr name="components">
    <str>suggest</str>
  </arr>
</requestHandler>



-----
Nutch Solr User

"The ultimate search engine would basically understand everything in the world, 
and it would always give you the right thing."
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