JMX statistics for Queries partially doesn't work

I was playing around with Query JMX statistics, and found out that there are several attributes like SearchQueryTotalTime are always 0 (this attr. represents the duration of query in nano-seconds), even though I'm running the infinispan query.

The only attribute which is updated and returns proper value is StatisticsEnabled. Also the following operations work as expected:

getNumberOfIndexedEntities(String entity)
clear()

I've tried also to retrieve the statistics using the following method:

Search.getSearchManager(cacheManager.getCache(CACHE_NAME)).getSearchFactory().getStatistics().getSearchQueryTotalTime()

and it returns the same results as if getting via JMX.

You can find the whole running test attached.

Best regards,
Anna.