Slow growth after 20 days,Advice?

Its stunted from topping as I see zero other reason for it, this happens sometimes being more risky to do it earlier than forth node. I know photos can do this but autos you will have more consistent luck finding another training method. Sometimes it works and thats great but others you get a dwarf or worse. Will still produce I think. "Never stress an auto" its what I go by. Good luck they look good other wise 😃