"reputable breeders" - Sadly once profit is the primary motivating factor, this often goes out the window. Better to ask for forgiveness than permission.. says the sociopathic (small) business owner.
so, genetics is not out the question even if you paid top-dollar.. in fact it may even be mildly correlated, i wouldn't assume either way.
the fact that it happened to several strains? from several breeders? definitely points more toward environment. or, was it just one or two strains of the bunch? (rhetorical) The more strains involved the more it points to environment. and if all the hermie plants were bunched together in one general area, that also points to environment.
light leaks can be tough to see... you may only be able to notice or see it if standing in the exact right spot. some beam of light directed at the right spot in plant. from ducting is a common one to miss. and sort of light labyrinth employed?
any weird magical foliar sprays promisng the world?
alas, all you can do is guess.. if it happens again, might need to revise the 110% confidence it isn't something in environment, 99/100 times it is light pollution, i bet.
most of those breeders have had duds before. shit happens. color of space by inhouse? something liek that, it was a flip of the coin if you got a shit ass batch of seed, lol... ppl paid through the nose for that one. beware of collaborations, lol.. those seem to be the most likely to fail of the overprice connoisseur stuff. Just a lot of genetically depressed plants, imo.
also, easier if you put useful pics here as a courtesy to those trying to help you. no reason to have to load 3 pages on a half-assed website that barely functions, then seaerch through weeks of diary for relevant information. i didn't bother, because you didn't bother, lol.