This happens as well on the search result page (interface in English only). Example contains "This search function might not work correctly. See also Bug 43238. (As of July 23, some basic improvements have been made; however, it will take several days to weeks for these to take hold.)"
Well, also, it now has been disabled, but is still showing for me, at least on https://www.wikidata.org/w/index.php?search=asfasfaf&title=Special:Search&profile=advanced&fulltext=1&advancedSearch-current=%7B%22namespaces%22%3A%5B0%5D%7D&ns0=1