There's nothing wrong with the plant itself. Its looks fairly healthy Honestly, some people strive for a plant that looks like that structure wise. It's a good growth characteristic IMO. Sometime plants like to "self-top" themselves. Sometimes those plants can be good or bad. I've had two so far and they both had slightly different growth. one self topped from seed, and the other one did it on the second node like yours. The case where it would not be so good is if you were doing a Sea of green not a Scrog.
A couple of things I've noticed that your medium seems to be pure peat have no aeration (perlite, vermiculite, pumice, lava rock). And looks like she's starting to be hungry for nitrogen. Pictures on here can be misleading sometimes depending on how the light is hitting the plant and sometimes plants are just more lime green in color. but from the looks of it she's slightly hungry. and not sure if you buffered the Ph of your coco beforehand but she was showing signs of the pH being off. i think you wanna be around 5.8-6 in coco