Any Idea?

Quite common on the first true set of leaves as long as the new growth is normal I wouldn't worry too much 👌

It is nothing..........nothing to do with either stress or environmental isues..............this "just happens". It is not a sign of anything going wrong, it is just "a plant trying to work out what life is all about". It will not affect growth rates, yields or potency.........it is just a weird leaf. Once you grow for a while, you will see all sorts of strange leaves and weird growths...........cannabis does some pretty odd things at times. And yes, it is quite common, and yes, most plant "grow out of it"............but some plants can do it for their entire life. It is nothing to be worried about.

Hi ...... Das ist eine Missbildung...... kommt öfter bei jungen Pflanzen vor und ist nicht dramatisch 😎 Macht der Pflanze nichts aus ........ Viel Glück

It's just miss grown nothing to worry about

It's fairly common in plants around this age. They almost always grow out of it. At the very least it doesn't affect anything negatively

I believe it's an environment issue and stressing the plant either through temperature being too high or humidity being to low.. Unfortunately I have this happen every now and again since I have a hard time keeping my humidity up - at least that's been my experience. All my plants that started this way never stayed that way and resumed normal growth once the plants matured a bit.