This a wild guess, but:
Pocket pistols have become a fad, due to their ease of concealment. Maybe the manufacturers have ramped up production to keep up with the demand, and in so doing, have abandoned quality control. Manufacturers with great reputations for high quality are cranking out guns with lots of defects these days.
"They're on our right, they're on our left, they're in front of us, they're behind us; they can't get away from us this time." Lt. Gen. Chesty Puller, USMC, Chosin Reservoir, Korean War