I was having a conversation with a friend the other day there about light leaks. I think there is too much put into people saying a light leak caused a herm problem anyway. I mean you need to have a serious friggin light leak for a plant to think it's daylight. When I look at the girls outside the sun is going down at 8ish and so are the leaves bedding down for the night. And I tell ya, it's still daylight to me out there, I could quite easily read a book. What about full moons, do they make nature go herm...nope. As I said, light leaks are minimal problems, so unless you got a bad timer....well need I say more about my opinion, lol.
It could be a host of things Las, perhaps the clone got stressed too much in the journey (or did you clone the clone?) Perhaps the feed was a bit off for it (although I chuck most things at my DOG and she's happy to munch away). And the one that I think is possibly a killer for kush, is Heat. If the temps have gone up a bit too high this could have also stressed it. Bottom line, the Chemdog linneage has herm recessive traits, so it's not hard when working with such a beast. I have seen 1 seed in my last batch out of....a lot of grams
Saying that about temps, I have had over 30 degree this summer and the DOG was fine....ach, fuk knows. Moving on, lol.