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Not really sure what I am supposed to be looking at, but I wouldn't worry. Your plant will work it out. Cannabis can grow all sorts of freaky weird leaves at times.
Dont know how or what you grow in but to diagnose you check your runoff waters ph and ec levels. Going into flower your ph should be around 6.7 for soil and ec should be around the 1.8 to 2.0 mark 900 to 1000 ppm. Cheers