Athosanswered grow question 6 years ago When weird leaf symptoms appear the first suspect is wrong pH, and since you are not giving any info about measuring pH or adjusting, my guess would be some lockout due wrong pH.
Second, you are not telling how often you are feeding, or what is the EC/PPM of your feeds; my second take is some kind of nutrient excess, I suspect minor potassium excess (toxicity) which in turn locks out many other elements.
Try to flush and give just water for a week and tell us how it goes.