Looks like a few possible things going on here.
I’m not sure exactly what soil you’re in but it looks like a hot soil. You mentioned a few weeks back your run off came in super high. If you’re in something like FF ocean forest.. you shouldn’t need ANY nutes for several more weeks. Especially on an auto.. they ordinarily only need 1/3-2/3 strength feeding of normal photoperiod plants.
First off, I would cut nutes for another week or two at least assuming you’re in a somewhat nutrient rich soil.
Secondly, make sure you severely reduce the fox farms feedings when you do start feeding again. Fox farms feeding schedule and directions on back are way way too strong even for photoperiods that I run. I usually do 1/4 - 1/2 strength of their nutes on photos so you should probably be around 1/4 strength for an auto.
Part of this looks like heat reaction or wind, but some of the twisting on those thin younger leaves is an autoflower thing IMO - I’ve done zkittlez auto from ILGM and it did that same twisting of new growth. It was frustrating but I saw it on several other autos.. I chalked it up to an autoflower quirk..
Keep heat in check and make sure wind from fan isn’t too much.. and you wanna wait a bit on nutes In general and when you do - dilute them