Yellow on my leaves

if you didn't drip anything on it or the climate isn't totally bonkers, could just be some ugly mutations. Sometimes they can look fugly the first 2-3 sets of leave then look fine later. Hopefully new growth is healthier. As long as you don't see this too often, probablynot anything you are doing. If you see this stuff often, time to rethink products used and methods. Mutations aren't too uncommon, especially if inbred. while it's not super popular behaviour in this hobby, it's common to plant more than you need so you can safely avoid mutations and even a self-inflicted error or 2. I plant 200% of the number of plants i want to ensure i get 8 robust plants. I'd rather avoid some dud plants and throw out a couple good ones to ensure a well-filled area. Wasting time on garbage plants is a poor use of resources and hurts productivity.