HiJack Autoflower DWC

Pictures are best in white light. But could be many things. Drop of water that light magnified giving the spot light stress or burn. Another ph in soil could be getting close to out of a good range. I would check ph and if its good it could be onset to potassium deficiency. Hard to see good in picture. Good luck and happy growing. Leaves won't repair themselves. Can only stop spreading. 🌲🌲🌲👊