After Pucci obtained Made in Heaven, he began accelerating time for all non-living things in the universe. Due to this, the whole world experienced various strange phenomena. These includes corpses rotting quickly, vehicle moving faster than a person could operate leading to widespread accidents, the sun and moon moving at fast speeds across the sky, and oddly specifically, every manga artists being unable to keep up with the weekly release schedule.

Correction

Um actually … Not every manga artist is unable to keep up. In particular, Kishibe Rohan is able to keep up with the accelerated schedule.