I would say its possible it's a unlucky batch but likely something along the lines of grower error...no offense. Even ppl that grow for years and pull good harvests have their ups and downs...some plants have different food requirements, and water/soil PH is a big player in having issues...even the same soil mixed differently in different pots can have different starting PH which can throw things off...even slight over watering can stunt autoflowers....
And TBH your Temps are way too high for daytime/nightime..that will stunt/hinder autos for sure. I don't even grow indoors until fall and winter because its too costly to cool this place to 60F to dry/cure during the summer. Much easier to grow in Fall/Winter because the light heats the tent to 80F daytime, and goes down to 70F at Night time...
I really love your grow and as long as you're happy thats all that matters but just wanted to share that even a "master grower" is still learning everyday just like me who is just a "hobbyist" for a personal stash for medical Use... and having OPTIMAL CONDITIONS is ESSENTIAL to bring out the best Genetic Expression of any Culitvar ESPECIALLY A AUTO....otherwise its not even worth it for the results one will get.
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