I was having the same problem, am using Chrome with Duck Duck Go search enabled. Once I turned off "Duck Duck Go" in the setting, all searches on the forum worked perfectly.Search seems to have issue. Shows results in quirky format (as mentioned above), yet clicking on link(s) always comes up "Oops, we ran into some problems. The requested page could not be found". Using information from Search results the article can be manually located in respective thread. Processing URL from Search results has glitch.
Hope this helps.
Ray