Hey dude we’ve chatted back and forth prior but I just wanna say tour auto looks just right for the Grobo. Autos grow a bit differently than some other photo periods and take some time to do their thing. The browning on the leaves is normal, those leaves will come off sooner or later as she gets bigger. I recommend to think in terms of foresight when you look at her. Where would you like to see tops? How many do you want her to have? Will you LST or does she need any leaf tucking/demolition to help her nodes grow?
I personally keep my Grobo in a closed room, if you look at my latest grow as soon as I moved the Grobo into that closet she exploded with growth. I’m not quite sure why, but the consistent humidity and warmer temperatures may be playing a factor