Maybe your PH is to high. I'm growing in coco and i know mine should be around 5.8-6.2. I'm not sure about soil. You might have a nute lockout where the nutes are there but since your PH is off they can't be used.
Mine was 5.6 and I figured out that in coco the PH has to be between 5.9-6.1 for the magnesium to be used. I changed my Ph to 6.0 and now the plant is doing fine.
good luck