Question

Hello my friend, I can see some problems here and the first thing you want to do is stop feeding and let the top layer of the soil dry out completely in between waterings. The roots lack oxygen and when you continue this behaviour then your plant will stay this small. The soil got enough nutrients for another 2 weeks without a doubt. You just want to water with pH 6 for this phase.

Not enough light and you shouldn't give that few Grow nutrients from the tri-part you use. In veg, plants needs nitrogen, and and it's mainly the Grow part that supplies this nutrient.

Autos can be shit, but its mostly do to their breeding and finicky nature. I have grown my own share of autos that have shit the bed and other that have grew wonderfully. comes with the trade of growing them. Autos really have issues with their root base, if your medium is to wet or compact they don't like it and do weird stuff. same with feeds. PH and temps. they are princesses IMO. Your plant looks stressed. I don't see an ec rating in your journal, this could be part of it. I see a few baby 4 and 5 finger fan leaves so it might be on its way just taking its time. Aggressive LST could also be a factor in it, not all plants like LST or HST. With autos I like to experiment and try my hand with them on a cheaper seed vs a expensive seed bank. Mephisto is known for their autos and they are pricey. I would aim for a lesser brand but with good results still. Fastbuds or GanjaFarmer seeds have been good plants for me. Also grew out a strawberry auto from Pure Instinto and it was fire. price point not to bad either. So try again with a different seed till your more comfortable then pop one of these bad boys again. Good Luck!

This is just a overall sign of poor health. Autoflowerz sucks doesn't know shit about autos. They are really for more experienced growers since there is no way to control the growth. Big autos come from dwc, or coco/perlite grows if you know how to maintain the coco right.

Inconsistent light schedules or environmental factors can cause the plant to start growing 3-point leaves as a stress response.

Cuz it's an Autoflower. They are dogshit. They are not carefully and selectively bred like reputable seed breeders do with Feminized seeds. Thats why people get shit yields and weird growth and hermi auto's. They aren't all shotty, but tons are. There's no way to verify the stability of the genetics. Scammers are seeing the gold rush in this industry isn't the product, it's the seed racket, and it is lucrative when you consider a 6 foot pollinated female can produce THOUSANDS of seeds. And at 10 to 20 bucks a seed....you do the math.