AsNoriuanswered grow question 1y ago Lockout , plant doesn't  absorb ???
Calcium and hunger from look.
Maybe pH swing.
First test run off , check ppm and ph, that will give you idea.
I saw that you use ff line and calmag.
Ff is very potent, ussually  you almost get nitrogen toxicity  with it, thats why i guess some lockout or ph imbalance  is happening.