A little late to the party, but I concur. The pics show symptoms of overwatering and overfeeding. The overwatering symptoms really mean inadequate oxygen, yes, oxygen to the roots. I am not familiar with the autopot system, but I will conjecture that the roots are always wet, in un-oxygenated water, which is harsh on the root hairs. The plant loses ability to take in water, and what water it does taken in is heavily laden with nutes, which, because the water intake is low, causes high solution concentration in the plant --> over feeding/burn. It's a guess, but that's all fact based.
Is it possible to add an airstone to the pot, so that the solution is oxygenated? Most hydro growers, including me, use aquarium pumps and a big airstone to each pot. I would reduce the nutes to 60% of where you're at, and add air. A pump and stone won't cost $40. You might also consider adding
hydroguard to the solution, which adds beneficial bateria to combat root rot, which might also be happening, again because of the air situation.
My two cents. I've been growing hydro since about 1978.
[Edit] . I see you're doing better, but I still recommend adding air and
hydroguard.