looks more like boron which would be odd, so i'd look into lockout by nute or pH. N , K and Ca can lock it out if they are too high.
And, looks like nearly impossible to lockout with pH, so go ahead and look into those three.. somethign is too high
i can't find any information on nutrient content of these products.. that's an increased level of difficulty for absolutely no reason. so, it's impossible to give oyu an educated guess with no relevant info available.