It was announced through the official Twitter account of Jump SG magazine published by Shueisha that Daisuke Ashihara’s World Trigger manga will not appear in the Feb 2022 issue (plan to produce on Jan 4), due to the author’s health issue.
The project will return in the March 2022 issue of the magazine which (plan to produce on February 4, 2022)
Before that, the manga used to be delayed for a month because of the same reason in March, May and November.
World Trigger was launched in Weekly Shonen Jump magazine in 2013.
The project has also been adapted into a TV anime.