In my opinion The auto is pretty finicky when it comes to nutes, don’t need much at all. Easy to over feed, calcium and magnesium can be an issue I do t use calmag anymore as you can lock out one with the other,
Looks like a uptake problem to me something in the root zone possibly bad ph, possible cold roots? You could have them locked out with all the nutes ur feedin, get that ppm/ec meter it will be your best friend my 2 cents