This is very strange to me... I don't know what you mean by intervened the autoflower… I will attempt to answer as best I can... I have seen a few issues of autoflowers not "flowering" when they are suppose too. I usually just recommend people try 24-36 of darkness and then go to a light schedule of 12/12... Auto flowers are suppose to Flower by maturity.. You already know that. But if your autoflower doesn't flower.. It's not gonna change it mind. It's best to try Jump starting the flower... And if this is indeed the case. I would recommend staying on 12/12 for the rest of the grow. I hope this helps and happy growing..