the concept search works as expected for me. Do you have a concept scheme selected and do your concepts have a skos:inScheme property?
Please take a look at the screenshot attached. I am searching for "Concept," and the search setting is "Starts with." On the left pane, "Concept one" is selected. When I select "Concept two" in the search result and click OK, 1. the search result list will be closed, 2. "Concept two"
will be selected (highlighted) in the left pane, and 3. VB3 will display the details of "Concept two" in a new resource view tab.
Kind regards
Roland