So many possibilities from low light to the genetics. Temperature too much or too little nutrients, just so many things can stress plants happens to the best of us. Some plants just can't handle the same things as others.
Many people just blame the breeder but a lot of times that's not really the problem of course the term breeder gets thrown around too much. Just watched the guy from Phylos saying about the same thing I thought years ago only much worse than I thought. He said even Northern Lights you plant 100 seeds you get 100 different plants and that seeds are like snowflakes because each one is unique.
Makes sense, I got an amazing plant from Mr. Nice Shit didn't keep a cut like a dumbass and about 100 seeds later from the breeder nothing has been as good. Still all pretty good just not that elite one I didn't get a cut of.
Got to love it when some breeders give specific descriptions you just know you won't get what they promise in a single pack of seeds then of course they want far too much money. But some of them do dial in traits fairly well just still require selection much more than 10 seeds of course you usually find a nice plant in 10 seeds unless you are growing Blue Dog Shit.