Blueberry og

Hi bro do you have an extractor fan in the tent ? It look like leaf stress , heat or humidity , if your humidity goes too high it can stop transpiration, get a breeze going , have you increased water? The fact it’s the top leaves tells you something ‘ have you checked cal mag ? 😉

Light burn? Hot spot under the led? Center of tent and tallest bud?

Agree. Looks pollenated 100% perfectly. Too perfect, Never missed 1 pistil..very curious. I suspect it's not pollinated. I produce S1 and F2 seeds and sometimes collect and brush pollen on a specific bud. Brown bag and shake as well if I'm doing a whole branch Even after several applications of pollen they never look like this. There is usually some whites being produced right to the right to the end of harvest as well. The pistils just dont turn 100% all at once brown either. They recede into the calyx. This doesn't look the same. Was this sudden or over time? Id look for a pest? Or perhaps an elbow accidentally snapped and there's broken stem right under the bud by chance? Or its was pinched for a sniff and pistils are damaged?