My Leaves are curling like a taco.

Hello I have some leaves turning Up like a taco..What causes this to happen..I have them in Happy Frog Soil..It just seems to be the top leaves doing this.

Nobody knows why?

look here:
https://www.rollitup.org/marijuana-plant-problems/150004-plant-moisture-stress-symptoms-solutions.html

It could be too hot in there....or the 1st signs of overwatering..? they dont really look nute burned but if the edges go brown over the nxt few days in could be that... sorry bout so many options ,,,but I think you could break it down from there and at least rule some causes out