The official Twitter account of Boku no Hero Academia Kohei Horikoshi announced that the manga will not appear in the 32nd issue of Shueisha 's Weekly Shonen Jump on Monday so the team can switch to the Digital version.

The magazine's editorial department stated that the team's change in how to draw the manga went from analog techniques ( pencil and paper ) to digital due to the effects of the new coronavirus ( COVID-19 ), and they are taking precautions to reduce the risk for Horikoshi and his team.
Shueisha had planned to release a new chapter in the 32nd edition 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 come in the combined 33/34th issue on July 20th.
Furthermore, Shueisha stated on May 11 that the magazine's staff anticipates further delays for manga that are in progress while authors are drawing manga in a way that minimizes the risk of being infected with COVID-19, and the time required for a manga creator to draw a manuscript has increased considerably.
Source: ANN