Leaf burn? Deficiency? What am I looking at here?

Ive had this happen when giving my girls bloom nutes too. I believe its the large amount of Potassium or Phosphorus that is causing it. Not sure if its locking out the Nitrogen or what, but I made sure I used my bloom nutes at a weaker strength mix and a bit less often and added Cal mag and the issue didnt exactly go away but its more im just aware now when I feed em I can see it in the leaves a few days later, they seem to lose that dark green that comes from a bit too much nitrogen during veg, like they almost get a touch bluer instead of being so green. I also tried adding a bit of grow nutes back in on top of the bloom, and it did help. I never really figured out the issue, first year using that brand of bloom nutes so maybe was too strong still at 50% strength or I used it too often, maybe every 10 days be better than every week.? Either way once I got the issue a bit under control I never worried about it as Im more worried how the flowers look in bloom, not the leaves. A few weird leaves here and there in flower never bother me and the later in bloom it is, the less I care what the leaves look like. Keep in mind we growing flowers not leaves ok. Id suggest making bloom nutes a bit weaker and tossing in a lil more cal mag and some veg nutes again too for a few weeks and then switch back to the same mix you were using before.

The beginning of calcium deficiency. Get some cal/mag into her! Or more off it if you are already giving some. And yeah, cut back on the nitrogen, being a sativa dominant strain, nitrogen is only required in moderate amounts.