Strange light green spots

I had the same type of spots on a leaf in the fifth week of the plant's vegetative stage. In my case, I haven't used any type of liquid fertilizer yet, just a substrate rich in organic matter, compost, and some guano. So I don't think the reason is over-fertilization. I opened a question on the blog because I had never seen this type of spots, but I still don't have a clear answer. Best regards.

Looks to me like you introduced nutrients to the plant too soon. I have a similar issue with My Grandaddy Purple auto. She was also introduced to nutrients too early. Young plants cannot process the nutrients that well yet. Hence why many start with half-doses and see how the plant responds. I would give the plant just ph'd water the next 7 days and see if the problem appears on more leaves. If not, you're set :) Hope this helps, even just a little.