The official Twitter account of Kohei Horikoshi, My Hero Academia , announced that the manga will not appear in the 32nd issue of Shueisha 's Weekly Shonen Jump on Monday so that the staff can switch to the digital version.
The magazine's editorial department stated that the team's shift in manga drawing techniques from analog ( pencil and paper ) to digital is due to the effects of the novel coronavirus ( COVID-19 ), and they are taking precautions to minimize the risk to Horikoshi and his team.
Shueisha to release a new chapter in the 32nd issue even with the change in procedures, but the manuscript took longer than anticipated, so the staff and editorial department decided to postpone the new chapter. The next chapter will be released in the combined 33rd/34th issue on July 20th.
Furthermore, Shueisha stated on May 11 that the magazine's staff anticipates further delays for ongoing manga series, as authors are drawing manga in a way that minimizes the risk of COVID-19 infection, and the time required for a manga creator to draw a manuscript has increased considerably.
Source: ANN