I agree. I’ve had two regs in the same room, both healthy, one goes full blown herm and the other never throws a ball. I’m not a botanist, but I believe different plants react to stress differently in some cases and in others it’s just genetics.
I’ll try to keep this short, but I have a GG#4 that I reversed hanging right now. I started with two Fem seeds. One was to be the donor (reversed); the other was to be the receiver of the pollen. Both plants were in the same 2 X 4. I sprayed the donor (outside the tent) every couple of days with STS and after around three weeks, the intended pollen receiver went full blown herm on me overnight (trashed it immediately), and the donor took forever to reverse. I’m still not sure if any of the seeds are mature. They look pretty small.