Looking at that bottom leaf... it could be
iron deficiency
sulfur deficiency
nitrogen deficiency
I'm betting on Nitrogen def. I probably started bloom nutes a little early and didn't add any N. I'll give her a little taste of N next time I feed.
Update: gave her a taste of grow nutes with N but not too much. 1tsp/gal along with the bloom nutes @ 3 tbsp/gal. Water pH tests at ~6.5 but the soil pH is drifting up.
Lay down some bud catchers maybe. That's some late night partying going on. Hope you find the lil shits.
Apply some leaf wash to kill them and if there is the odd 1 or 2 kill em before they lay eggs.
Good luck man