This makes sense. My auto AK47s have seemed a little sensitive to over nute. I can't really push them past about 300ppm or they start to get tensed up and change colors pretty rapidly. Transpiration has been consistently good though. And when I water them I water them really slow in doses to allow for maximum saturation. Then I put them on an old towel to give them a facilitated drain. I let her dry out really well also. I’ll push her 7 days without water and then give her a good watering again. Wet, dry, wet, dry etc.
I'm running MGOsoil with blackgld wrm castings and pearlite in thirds, my nutes are MG and Open Sesame. She’ll get molasses and algae tea on occasion. My lighting is 4,200 lmn(2700K) and 2,400lmn(5500K) that 6,600 lumens for about 1SF with decent reflection around the lighting and the plant.