Boost Value not working in full text search in AEM 6.1

We have a requirement of full text search where we have to show results based on relevancy. We have created a full text lucene index and assigned boost value to the properties. But we are not seeing any effect of boost value on the search results. Is there something else which is required to enable boost values in search? Our AEM version is 6.1 and oak version is Apache Jackrabbit Oak 1.2.2.

Attached is the index configuration and below is the query we are executing:
SELECT * FROM [nt:base] AS s WHERE (ISDESCENDANTNODE([/content/thf/en]) or ISDESCENDANTNODE([/content/dam/thf/en/docs])) and CONTAINS(s.*, 'Global Real Asset Fund') and ((s.[jcr:content/cq:tags] like '%thf:role/role1%') or (s.[jcr:content/metadata/cq:tags] like '%thf:role/role1%')) order by s.[jcr:score] desc