Search portlet in 8.2

I have implemented a search bar portlet and search results portlet in Designer 8.2. From MWS, I wired two portlets (“search query” property of search results portlet is wired to “last search state” property of search bar), but the search results are not fetching any data from the DB whenever I supply a search string in search bar. However, the search results table is flashing whenever I hit “Search” button.

There is data in DB corresponds to the string I am entering in search bar. With all the same settings, the search portal is working fine in 7.1.2, but not working in 8.2.

Am I missing some additional settings that should be done in 8.2 for the search portal to work? Please help.