Hey, the new growth just needs a little time to darken up. Don’t sweat that. The ladies look good and healthy.
Regarding the self topping, yes that can happen. It’s a nice treat when the plant does it for you. Save you the trouble and eliminates the stunted growth time during its veg.
Your plants are going to be sturdy at this point so keep an eye on them and just take your time assessing any issues and they’ll grow up just fine.
Happy growing.