This may reflect a loss of trained operators and the increased difficulty in sourcing targeting electronics.
On the plus side, this provides good practice in taking cover for the locals. JL
Isabel Van Brugen reports in Newsweek:
An X-59 missile was discovered in a field near the village of Krasnoye in Russia's Belgorod region on April 19. Belgorod is located near the Ukrainian border and houses Russian military bases. The region has been rocked by explosions throughout Russia's invasion of Ukraine, with local authorities regularly reporting unmanned aerial vehicles. In March and April alone, Moscow forces have mistakenly dropped at least 21 aerial bombs from its aircraft on Russian soil. Russian authorities tend to cover up the incidents, saying that there was "an abnormal discharge of ammunition."