please tell me this problem

I agree with @rkymtnman, I don't see what would look like a Cal/Mag issue and this that they look relatively healthy for where they are at. It looks like some kind of lockout. N deficiency is low and relatively uniform. Cal/Mag problems can get ugly fast. I bet your PK is locking out calcium.

My opinion ( which means nothing) Flush and/or feed with all 17 major and minor nutrients , the law of minimums may be at play here

Enkisatan