Widget suddenly won’t display the chosen category when logged out

The Recent Posts Widget With Thumbnails Widget suddenly won’t display the chosen category when logged out. When logged in, it does show the proper category. I have cleared all caches, website and browser, and even recreated the widget, deleting the old one. The behavior persists.

Does this have something to do with the plugin not working correctly with latest WP core update? This plugin hasn’t been updated in six months, and we just updated to the latest WP version.