7.9.0 FullTextSearch Log Entry?

Upgraded to 7.9.0 yesterday. When I use WUI to search, I now see this entry on the log:

83131: [16-06-05 08:52:23.3874] Slim::Plugin::FullTextSearch::Plugin::parseSearchT erm (251) Searching for very popular term - limiting to highest weighted column to prevent huge result list: 'w10:KI*'

Why is this logged every time?