My experience has been just the opposite but who knows for sure?
So many different types of stress can cause a female to turn hermaphrodite. And the regular seed stocks I've been using are all F1 generations grown from seed themselves (not clones) which might have had some effect too.
The grow I just finished was from two cultivars, both of them developed hermies. I started out with 12 plants, had them sexed at 3 weeks and picked 6 females for the grow. Of those six, two developed a few male flower pods. I cut them away immediately and kept a very close eye on them_ checking every day. Then a third plant started to get a few male "pods". For the next few weeks I checked them every day and if any male flower parts were discovered they were removed. No pollen was released because I got the "pods" before they opened. I decided to wait it out and see what happened because I couldn't start another grow until Fall (but who knows_ with this covid-19 I might have time for some extra gardening this season?).
After a few weeks no more male flowers appeared but I kept checking them. I didn't find any seeds when I cut them up to cure so probably won't find many more. Got Lucky there! I never had such a large percentage of females turn hermie on me but I'm at a loss to say why. All the environmental conditions for this last grow were the same as the last three so I'm thinking it must be a genetic thing more than a environmental one.
Both of the cultivars shared the same fathers genetics, only the females were different. There are just too many influencing factors and not enough of a sample to determine what likely caused this. I've gotten a hermie once in a while but to have 3 out of 6 plants show signs was very unusual. Guess you never really know what's gonna happen when you start with F1 cultivars as seed stock!