Heat stress? Or something else?

Led lights man, pain in the butt

Environment! Dial in them temps g chuck in another fan or maybe a ac unit if you got one?

It’s definitely environment! Got to get that heat lower. Airflow and humidity too

To much heat or light usually causes the leaves to start to taco or look like a canoe. Also as Dr. says., autos can be overfed very easily. With autos I started feed at 200 ppm 0.4 ec and work your way up to about 600 ppm for when their entering flower stage. If you haven't got a ph ppm reader, I suggest you get yourself one as this is every growers most useful tool for successful growing. As for the heat, that is hot for the girl. If you can leave the tent open while lights on and a fan blowing the cooler air in there, should take care of the heat issue.Cheers

what strength nutes and line did you give her? with autos ive read its good to start at usually half dose, also if youve got a big fan pumping on it you might have some wind burn going on to aswell as heat and maybe some soil moisture issues do you have a soil meter how often have you been watering that could be on cards aswell