Please help, 3 weeks 12/12 spotting on leaves

She is 3 weeks from switch to 12/12. This is only happening on a few leaves mainly at the top of the top of the plant.

Grown in Fox Farm Ocean Forest, using Big Bloom, tiger bloom, and open sesame.

Last feeding I gave 80% of the fox farm feeding schedule.

I have aves only given water and some Sensical since feeding.