The search function in the research screen does not appear to be returning all results. My specific experience as TEC Enclave: when searching either "prova" or "scout" in the research screen, the military research "Corvette Shield Refit" is not one of the search results. It should be, though, as the Prova Scout Corvette is listed on the research. As far as I can tell, the search did highlight all the other prova scout related researches, just not this one.

I did not test other search terms, so I don't know if this is a general bug in the search functionality that could be affecting other searches or for some reason just this specific search.

Edit: Also noticed when searching "culture" as TEC Enclave, the civilian researches Foreign Sabotage and Commercial Appropriation do not show as results.