Root bound or what?

From what I've experienced its start of Nitrogen toxicity, or salt build up time to flush her pot e.c down a bit with the right ph

Apart from looking thirsty, I can't really see much wrong, maybe a bit too much nutrients, but nothing major.

Hmm when leaves are drooping it usually a sign of overwatering along with the tips being light that indicates something isn't in balance in your nutrients and if your getting small branches theres likely not enough silica in your feeding schedule silica is not a needed extract but it helps build strong plant cell walls which helps build stronger larger more robust branches. I would double check your feed she maybe getting too much or too little of something. it could be an overfeed and most likely is but if it is. its very slight and I dont think would impact growth that much with a lower feed im sure it would sort itself out. to know an overfeed for sure the edges of the leaves will turn orange from the edges inwards being a dwc grower overfeeding is something I am used to lol anyway best of luck brother :)

you are correct. when the leaf bends down like that its nutrient burn. you might need to do a flush to wash out salt buildup in your soil.