Yes please include all the info...you said its happened 3 times? Tell the backstory to those 3 genetics. It is possible the breeders didnt do well and you just had bad luck 3x in a row.
i did earlier in the thread but for all of you that didnt read it ill type it up again
My settup is full Ocean forest soil, 6.5 ph, 500-600 pppm feeds in flower, organic nutrient feeds of microbial and big bloom, mars hydro lights ranging from 100 watts to 300 ( yes they fully turn off when the timer is done) and in tents i cover up with sheets to make sure all pinholes are covered with no paint or plastics or glues. the only thing thats not in a tent is the cloest grow thats shown above, everything else seems to do fine but i get a hermi here and there and it ruins the whole grow and i dont wanna smoke seedy weed
this happened to some tropicana cookies clones but not bad like a nanner or 2 at the end of flower, this also happned to some punch pine berry that ended up herming but nothing else in the tent did, i had to chuck the wholke grow because there was pollen spreading everywhere
side note could it be the soil just being too acidic? ive read people feeding at 7 ph and getting run off of around 5. i tested my soil on some old stuff and it ended up being 5.5 from a blue ph soil tester