The latest chapter of Go, Go, Loser Ranger! didn't appear in Kodansha's Weekly Shōnen Magazine, issue 12, due to creator Negi Haruba being sick. As a result,
Dang, I feel like this manga was getting back some steam and maybe even pushing towards conclusion. Of course, I would rather it be on hiatus than sacrifice the author's health. Hopefully they get better and are able to pick it up again soon!