Why are my leaves canoeing?

I just happened to check the other photos and your VPD is way off at 1.77 and you should be 0.96 and 1.15 your humidity is way to low for 72F and should be at least 60% to get you to 1.07, it's a good start you might need a humidifier...

Yeah turn your light down or raise the height. Def heat stress via to many photons

Too hot. Light is probably producing a hot spot. Or you have a disease. Would need good pictures of colas forming to tell better. I just went through hplvd or dudding disease. I have 2 of the diarys of 14 it destroyed still in my profile. It got passed around my grow rooms. Kept the last 2 for education purposes.

Leaves curling upwards: it could be a sign of potassium deficiency or overwatering. Indoors, I water every other day. Check these 2 options and let me know if there's any improvement.

Your temps are fine. 23c is more than optimal. I don't see anything other than too much N. Cut your ratios for grow/bloom 1 parts grow to 3 parts bloom. So .6ml/l grow to 1.8 bloom.. these are just examples. Also look at what you are using. They also might have N in them. At this stage you should be pulling back. Also the water shortage might account..as 34% is dry environment. In pre flower an RH at around 50 is pref. You really get much better growth. Your leafs are showing an issue. So all you gotta do is change something up. And if it doesn't get worse then your golden. Cross ref with what ppl but up here. Good ventilation will also help. A fan blowing over your canopy, just so there's a sway. Then that's enough. I do know, your ratios are off. Should be less grow to bloom 1-3. Good luck.

Leaves will canoe when the plant is stressed from heat. They can also canoe from root problems from over/under watering.