pistils don't get chlorosis.
If the light is too intense, you can singe some, but that'd be a yellow nub instead of some hairs - small or large spot depending on intensity. So, this does not look to be the case here. I think you are seeing nascent leaves coloring.
the nascent leaves do look like that have some yellowing going on, that cand be caused by more than 1 thing.
Ttemperatures may be the cause of some of the coloration in the other pictures in diary. Anything near or below 68F can cause 'Fall" colors in leaves.
If the pistils change color, that could indicate pollination, too... or wind burn etc.. again, more than one cause to the effect that you see.
I wouldn't overreact right now... i'd see how this progresses and be more confident in eliminating possibilities -- and potentially no problem at all. The balance of nutes being off with soem marijuana brand is nothing new.. it's par for the course. A good formula should work on 95-99% of plants without major issues and most being nearly perfectly healthy. It is attainable, if the products as instructed don't do that, it takes trial and error... or go with products with good instructions out of the box.. the ones that follow existing knowledge vs trying to be unique or "special for marijuana" usually do better.
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When something shows up, never go down the denial path of, "i do the same things for each plant, this shouldn't happen." clearly something is different for this plant and it still might show up in the other one, depending. Secondly, it doesn't matter if you do things exactly the same if symptoms show up on one, anyway, does it? It's a useless thought that can lead to poor decisions. Simply read and react (with patience when allowed)... who cares if you were doing everything the same before, what matters is the reality of the plant in front of you.