I've been listening to some Aroya podcasts lately. It's some crazy commercial company with super detailed sensors, software, a user specific programs. Check it out. Anyway, part of one of the episodes I heard was talking about crop steering and types of growth. One thing it mentioned is that if you over "fertigate" towards the end of flower it will shift to generative growth and cause the plant to foxtail even if it's not genetically predisposed to do so.
They suggest lower fertigation levels and longer dry backs. I've had issues the last couple of rounds with a few plants and will give the theory a test on this round