The manga “World Trigger”, written and illustrated by Daisuke Ashihara, will go on hiatus after the release of the next issue of Jump SQ magazine, which is scheduled to launch on August 4th.
Therefore, the plan is for the manga to return in the next issue of the magazine, which, in turn, arrives on September 4th.
World Trigger – Manga hiatus announced

Synopsis
In World Trigger, Earth has been invaded by little-known creatures called "Neighbors," and to combat them, the Border Defense Agency was created, utilizing alien technology. The protagonist, Osamu Mikumo, isn't the best agent, but he strives and does everything he can to defend planet Earth.
The manga “World Trigger” is written and illustrated by Daisuke Ashihara. The series began in Shueisha's Weekly Shōnen Jump magazine on February 9, 2013.
Due to the author's health problems, it went on hiatus in November 2016, and resumed publication in the same magazine on October 29, 2018, continuing normally until November 26 of the same year, before its transfer to the monthly magazine Jump Square on December 4, 2018.
Finally, the first volume of the manga was released on July 4, 2013, and currently has 26 volumes released.
Source: Mogura RE
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