Use of 'Preferred Language' filter in advance search doesn't fetch proper result

Steps to replicate:

1) Create a contact with preferred language = English (United States),
2) Select 'en_US' / English (United States) value in 'preferred_language' select box, and click and 'Search',
3) The contact created should get searched , but it doesn't, and 'no result found' can be seen .

WebTest_Contact_AdvancedSearchTest::testAdvanceSearch gets affected by it.