Seedling first true leaf malformation

Hi mate, I had it once when on my seedling condensed a drop of water, it works like magnifying glass with the light and burns it first leaves, second were ok, but grow has slowed a bit, from that time I am more carefull with high humidity, good luck

Looks like a mutant

That's just funky genetic. Funky pheno or maybe just a weird start where the seed shell didn't come off properly should be fine. You'll know as she goes if her leaves continue to show that pattern/mutation etc don't Swett it some of the best strains and phenotypes in the world start like that !!

Do not worry. Your sprout is doing OK. Breaking out of the seed shell and pushing through the soil can be hard work with some bumps and scratches so it is not unusual for the cotyledon (the first two leaves with smooth edges, false leaves) and the first pair of true leaves to have spots or deformations.