The guys from Marijuana SA sent in a sample of the Freedom Farms Classic for testing a few years ago, there's a Youtube video on it.
But most interesting from the results was the low calcium levels in relation to other elements, not that there wasn't calcium present, but just not very balanced.
I've been following a few of your threads about your use of BioBizz and Freedom Farms, as you seem to have that down. I might pop you a DM if you don't mind, you seem to be nailing it.
Feels the same from my side. It's almost as though regular feeding is creating an additional imbalance where some elements are being uptaken while others are locked out.
Picked up some new bags recently, so will see if anything is different. I don't want to rule out human error on my side though and throw full blame on FF - it just feels different to work with, and not behaving like I'm used to after all these years.