Un-recoverable state while using AnalyzingInfixLookupFactory with collection RELOAD action

All search requests fails after few sequiancial of Collection RELOAD requests with using spellcheck component
with AnalyzingInfixSuggester

Observed in Solr 4.6.1

Reproducible steps:
1. Initialized spellcheck component with AnalyzingInfixLookupFactory
2. Consider the collection "test_suggest" (if not create one)
3. Lets have a dictionary file 'dictionary_a.txt' with size in MBs (~20MB). Each line contains a word (max 20char).
4. Now, hit the collection reload (or core reload) few times in sequence. (Make sure that your dictionary files is large enough)

• req (core reload) : GET http://<solrhost>:<port>/solr/admin/cores?action=RELOAD&core=test_suggest
  or
• req (collection reload) : GET http://<solrhost>:<port>/solr/admin/collections?action=RELOAD&name=test_suggest
  5. do the search : GET http://<solrhost>:<port>/solr/test_suggest/suggest_handler?q=dr

Response : All the search requests fails.
Note : Do not turn off buildOnStartup

Sample Configuration:
<searchComponent name="suggest" class="solr.SpellCheckComponent">
<lst name="spellchecker">
<str name="name">suggest_a</str>
<str name="lookupImpl">org.apache.solr.spelling.suggest.fst.AnalyzingInfixLookupFactory</str>
<str name="indexPath">./index/analyzingSuggesterIndex_a</str>
<str name="suggestAnalyzerFieldType">text_general</str>
<str name="sourceLocation">./dictionaries/dictionary_a.txt</str>
<str name="buildOnStartup">true</str>
</lst>
</searchComponent>
<requestHandler name="/suggest_handler" class="org.apache.solr.handler.component.SearchHandler">
<lst name="defaults">
<str name="spellcheck">true</str>
<str name="spellcheck.dictionary">suggest</str>
<str name="spellcheck.count">30</str>
<str name="spellcheck.onlyMorePopular">true</str>
</lst>
<arr name="components">
<str>suggest</str>
</arr>
</requestHandler>