My guess would be all that pk boost is causing the plants to ripen way too early, and then you take them down even earlier still when only 70% of the hairs have been withered prematurely.
Contrary to some peoples thinking, a plant grown in perfect conditions will actually flower for longer than a plant that is stressed, which actually causes them to finish early and underdeveloped. Plants grown out for 10+ weeks in 12/12 if kept healthy have way more flavor and effect than a P stressed plant taken down at 6, that's just the way it is..
Your welcome for the earworm.